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((short description|List of definitions of terms and concepts commonly used in psychiatry))
((more citations needed|date=April 2012))This glossary covers terms found in the [[psychiatry|psychiatric]] literature; the word origins are primarily [[Greek language|Greek]], but there are also [[Latin language|Latin]], [[French language|French]], [[German language|German]], and [[English language|English]] terms. Many of these terms refer to expressions dating from the early days of psychiatry in Europe. 
((alphanumeric TOC|references=yes))

==A==
===abreaction===
[[Abreaction]] is a process of vividly reliving repressed memories and emotions related to a past event.<ref name=APP>Hales E and Yudofsky JA, eds, The American Psychiatric Press Textbook of Psychiatry, Washington, DC: American Psychiatric Publishing, Inc., 2003</ref> [[Sigmund Freud]] used [[hypnosis]] to rid his patients of pathological memories through abreaction.<ref name=APP/>

===abulia===
[[Aboulia]] or [[Abulia]], in neurology, refers to a lack of will or initiative. The individual is unable to act or make decisions independently. The condition may range from subtle to overwhelming in severity.

===achromatopsia===
[[Achromatopsia]] is a term referring to or acquired [[agnosia]] for color. This term includes [[color blindness]].
Achromatopsia is a condition characterized by a partial or total absence of color vision. People with complete achromatopsia cannot perceive any colors; they see only black, white, and shades of gray. Incomplete achromatopsia is a milder form of the condition that allows some color discrimination.

Achromatopsia also involves other problems with vision, including an increased sensitivity to light and glare (photophobia), involuntary back-and-forth eye movements (nystagmus), and significantly reduced sharpness of vision (low visual acuity). Affected individuals can also have farsightedness (hyperopia) or, less commonly, nearsightedness (myopia). These vision problems develop in the first few months of life.

Achromatopsia is different from the more common forms of color vision deficiency (also called color blindness), in which people can perceive color but have difficulty distinguishing between certain colors, such as red and green.<ref>((cite web |title=Achromatopsia |url=https://ghr.nlm.nih.gov/condition/achromatopsia#definition |website=Genetics Home Reference |access-date=22 May 2020 |language=en))</ref>

===affect illusion===
Mild illusions or misperceptions associated with changes in mood; e.g. mistaking a shadow for the presence of a person, perceiving movement in peripheral when there is none.

===akataphasia===
Akataphasia (Kraepelin 1896) refers to a syntactic disturbance of speech resulting from dissolution of logical ordering of thoughts. It manifests as rambling speech. Compare [[Derailment (thought disorder)|Derailment]].<ref>((cite encyclopedia | author = Ziemssen H | title=Syntactic Disturbances of Speech - Agrammatismus and Akataphasia  | year = 1877 | encyclopedia = Cyclopædia of the Practice of Medicine | url = https://books.google.com/books?id=jH0xSe-ZEXoC&pg=PA791| volume = 14 | pages = 791 ))</ref>

===akathisia===
((Main|Akathisia))
Akathisia refers to a subjective feeling of restlessness in the lower limbs that is related to abnormal activity in the [[extrapyramidal system]] in the brain, often due to [[antipsychotic]] medication.<ref name=APP/> It tends to manifest as an inability to sit still.<ref name=APP/>

===alexithymia===
((Main|Alexithymia))
Alexithymia refers to an inability to identify and describe emotions in the self.<ref>((cite journal | author = Sifneos PE | year = 1973 | title = The prevalence of 'alexithymic' characteristics in psychosomatic patients | journal = Psychotherapy and Psychosomatics | volume = 22 | issue = 2| pages = 255–262 | doi=10.1159/000286529| pmid = 4770536 ))</ref>

===Alice in Wonderland experience===
((Main|Alice in Wonderland syndrome))
In Alice in Wonderland experience, individuals perceive objects (including animals and other humans, or parts of humans, animals, or objects) as appearing substantially smaller than in reality. Generally, the object appears far away or extremely close at the same time. An alternate term for this is ''somaesthetic aura''. Also see ((slink||Lilliputian hallucinations))

===alogia===
((Main|Alogia))
Literally, this term means "not having words". The term may refer to either "poverty of speech" or "poverty of thought". In the former, speech, though adequate in verbiage, conveys very little information and may consist of stock phrases or vague references. In poverty of thought, by contrast, there is a far-reaching impoverishment of the entire thinking of the individual, who, as a result, says very little. It is typically a [[negative symptom]] of [[schizophrenia]],<ref name=APP/> although it may also be seen in advanced dementia.

===amenomania===
[[Amenomania]] (compound of [[Latin]] ''amoenus'', "cheerful"; and [[Greek language|Greek]] μανία, "madness")<ref>((cite book|title=A Pentaglot Dictionary of the terms employed in anatomy, physiology, pathology, practical medicine, surgery, obstetrics, medical jurisprudence, materia medica, pharmacy medical zoology, botany and chemistry|last=Palmer|first=Shirley|page=29|year=1845|place=London|publisher=Longman and Co.|volume=1|url=https://books.google.com/books?id=a52eGz7y-gkC|accessdate=22 February 2018))</ref> is a disused psychiatric diagnosis.

===amok===
((Main|Running amok))
The phrase "running amok" describes the behavior of an individual who is very agitated and may be at danger of causing harm to themselves or others.<ref>((cite web|title=Definition|url=http://www.merriam-webster.com/dictionary/amok|publisher=Merriam-Webster Definition|access-date=March 6, 2013|url-status=live|archive-url=https://web.archive.org/web/20130411151338/http://www.merriam-webster.com/dictionary/amok|archive-date=April 11, 2013))</ref><ref>((cite web |url=http://www.todayifoundout.com/index.php/2013/02/origin-of-the-phrase-run-amok/ |title=Origin of the Phrase "Run Amok" |access-date=2013-07-07 |author=Hiskey, D |date=7 Feb 2013 |url-status=live |archive-url=https://web.archive.org/web/20130710100404/http://www.todayifoundout.com/index.php/2013/02/origin-of-the-phrase-run-amok/ |archive-date=2013-07-10 ))</ref> The syndrome of "Amok" is found in the [[Diagnostic and Statistical Manual of Mental Disorders|DSM-IV TR]].<ref name="Appendix I: Outline for Cultural Formulation and Glossary of Culture-Bound Syndromes">((cite book |year=2000 |title=Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV-TR) |volume=1 |doi=10.1176/appi.books.9780890423349.7060 |chapter-url=http://www.psychiatryonline.com/content.aspx?aID=14123&searchStr=amok#14123 |archive-url=https://archive.today/20070605073224/http://www.psychiatryonline.com/content.aspx?aID=14123&searchStr=amok%2314123 | archive-date=5 June 2007 |url-status=dead|chapter=Appendix I: Outline for Cultural Formulation and Glossary of Culture-Bound Syndromes |isbn=978-0-89042-334-9))</ref>

===anhedonia===
((Main|Anhedonia))
[[Anhedonia]] refers to an inability to experience pleasure, and may be described as a feeling of emotional emptiness.<ref name=APP/> It can be a [[negative symptom]] of schizophrenia.<ref name=APP/> It also may be seen in severe [[clinical depression|depressive]] states and [[schizoid personality disorder]].

===anosognosia===
((Main|Anosognosia))
[[Anosognosia]] is a condition in which a person who has a certain [[disability]] seems unaware of the existence of their disability. ((slink||hemiasomatognosia|display=Hemiasomatognosis)) is a subtype of anosognosia in which the person with [[hemiplegia]] neglects one half of their body.

===Anton's syndrome===
((Main|Anton-Babinski syndrome))
[[Anton syndrome]], occasionally known as Anton-Babinski syndrome, is a form of cortical blindness in which the individual denies the visual impairment. The individual may attempt to walk, bumping into objects and injuring himself.
Anton syndrome is caused by damaging the occipital lobes bilaterally or from disrupting the pathway from the primary visual cortex into the visual association cortex.

===anwesenheit===
''Anwesenheit'' refers to the false perception of an unfamiliar presence. It is commonly associated with periods of grief, schizophrenia and other emotional disturbances.

===apophanous perception===
This is an alternate term for delusional perception. It is one of the [[Kurt Schneider|Schneiderian]] first rank symptoms and is defined as a true perception, to which an individual attributes a false meaning.

=== aphemia ===
''[[Aphemia]]'' is the alternate term for [[mutism]]. Mutism is absence of speech with apparently normal level of consciousness. Mutism can be dissociative (hysterical) in which an individual (commonly a child or adolescent) stops speaking at once without involvement of any neurological or physical contributing factor; or it can be elective (selective) in which a child does not speak at all in certain situations (such as in school) but speaks well in other conditions (like at home or at play). A rare cause of mutism is akinetic mutism which results due to a [[lesion]] around the third [[ventricular system|ventricle]] of the brain.

===apperception===
[[Apperception]] is a normal phenomenon and refers to the ability to understand sensory inputs in their context, to interpret them and to incorporate them into experience. Failure of apperception is seen in [[delirium|delirious]] states.

===astasia-abasia===
((Main|Astasia-abasia))
Astasia-abasia is a form of psychogenic gait disturbance in which gait becomes impaired in the absence of any neurological or physical pathology. The person usually walks in a bizarre manner. They stagger and appear as if going to fall, but always manage to catch hold of something in time. Sometimes these people cannot even stand, but on the other hand they are well able to move their legs while lying down or sitting. Often associated with conversion disorder or somatization disorder.

===asyndesis===
''[[Asyndesis]]'' means loosening of association. A milder form of derailment of thought, it is marked by the individual leaping from topic to topic which have only the most tenuous, if any, connection with each other. This is in contrast with [[flight of ideas]], whereby the individual's successive ideas may be linked and "understandable" to the listener.
See also ((slink||akataphasia)) and ((slink||entgleisen)) term introduced by (Cameron).

=== autism ===
((main|autism))
From ''aut'' = "self" and -''ism'' = "state or orientation". Originally, [[Eugen Bleuler]] used this term to describe schizophrenia. In general, it refers to any (pathological) tendency to be self-absorbed to such a degree that the feelings, thoughts and desires of a person are governed by their internal apprehension of the world and not by an external reality shared with others.

Today the term is used most often to refer to a specific developmental syndrome (see [[autism spectrum]]).<ref name=":0">((cite book|title=The Penguin Dictionary of Psychology|date=2009|publisher=[[Penguin Books]]|isbn=9780141030241|edition=4th|location=London; New York|oclc=288985213|last1=Reber|first1=Arthur S.|author-link1=Arthur S. Reber|orig-year=1985))</ref>((rp|p. 76))

=== autistic thinking ===
((Main|Anxiety|Sensory overload))

Autistic thinking refers to a cognitive progress that is not in accordance with [[consensus reality]], but rather emphasizes preoccupation with inner experiences and needs. See also ((slink||dereistic thinking)). More generally, it means thinking that is driven by internally oriented wishes and desires regardless of external factors.<ref name=":0" />((rp|p. 76))

[[Lacanianism|Lacanian]] Leon Brenner. citing Laurent, places autism at a level between "Ausstoßung" and "Bejahung", at the "first level of signification", under the banner of "autistic foreclosure", with Imaginary-demand and Real-need but no Symbolic-desire.<ref>((cite book
 |last1=Brenner
 |first1=Leon S.
 |editor-last1=Neill
 |editor-first1=Calum
 |editor-last2=Hook
 |editor-first2=Derek
 |date=2020
 |title=The Autistic Subject: On the Threshold of Language
 |series=The Palgrave Lacan Series
 |publisher=Palgrave Macmillan
 |page=175
 |doi=10.1007/978-3-030-50715-2
 |isbn=978-3-030-50714-5
 |s2cid=226498174
 |quote=In the case of the foreclosure of the rim, this negativity would entail the presence of the void in the real. Facing this dimension of lack brings autistic subjects to experience unbearable anxiety that they associate with a 'pure presence of death' (Laurent, 2012a, pp. 67-69, 84). [...] In order to surmount this terrible anxiety or ''troumatisme'', while having no access to symbolic castration, the autistic subject is disposed to achieve a 'castration in the real' (Laurent, 2012a, p. 67).))</ref>

Lacanian Pablo Lerner places [[Asperger syndrome|"neurotic autism"]] where there is no ''[[objet petit a]]'' but still an [[ego ideal]] and [[Phallus|phallic]] function; he places "psychotic autism" where there is no ''objet petit a'', no [[Mirror stage|social mirror]], and the absence of the ego ideal and absence of the phallic function.<ref>((cite book
| last = Lerner
| first = Pablo
| date = 2024
| orig-year=2023
| title = Speculating on the Edge of Psychoanalysis: Rings and Voids
| series= The Lines of the Symbolic in Psychoanalysis Series
| publisher = 
| page = 95
| isbn = 978-1-03-224477-8
| doi = 10.4324/9781003278740 | s2cid = 259009471
))</ref>

===autochthonous delusion===
((Main|Delusional intuition))

[[Karl Jaspers|Jaspers]] defined this as a [[delusion]] arising without apparent cause. For example, suddenly, without apparent cause, having the delusional belief that one is an alien.

===autokabalesis===
((Main|Autokabalesis))
''Autokabalesis'' is a term for committing suicide by jumping from a very high place.<ref>((cite journal |pmid=459744 |year=1979 |last1=Sims |first1=A |last2=O'Brien |first2=K |title=Autokabalesis: An account of mentally ill people who jump from buildings |volume=19 |issue=3 |pages=195–8 |journal=Medicine, Science, and the Law|doi=10.1177/002580247901900310 |s2cid=39917411 ))</ref>

===automatic obedience===
Automatic obedience is an exaggerated co-operation with an examiner's request, as if the individual were an "[[Autonomous robot|automaton]]" robotically obeying a command. It is often a sign of [[catatonia]].

===automatism===
((Main|Automatism (medicine)))
Automatisms are sequences of activity that occur without conscious control. They may be simple and repetitive ([[tic]]-like) or complex, and are usually natural-looking but purposeless. Automatic behavior is ''not'' usually recalled afterwards.

=== autoscopy ===
[[Autoscopy]] is the reduplicative hallucination of "seeing one's own body from the outside" while still maintaining an egocentric visuo-spatial perspective. Autoscopy is sometimes used synonymously with [[out-of-body experience]].

===avolition===
((Main|Avolition))
Avolition is an inability to initiate and complete goal-directed behavior.<ref name=APP/> It can sometimes be misinterpreted as laziness, but it is actually a [[negative symptom]] of [[schizophrenia]].

==B==
===''belle'' indifference===
''Belle'' indifference or ''la belle indifférence'' is characterized by a lack of concern and feeling of indifference about a disability or symptom.<ref name=APP/> It can be seen in [[conversion disorder]].

=== ''bouffée délirante'' ===
''[[Bouffée délirante]]'' is a French term used in the past for acute and transient psychotic disorders (F23 in [[ICD|ICD-10]]). In [[DSM-IV]], it is described as "[[Brief Psychotic Disorder|brief psychotic disorder]]" (298.8). The symptoms usually have an acute onset and reach their peak within two weeks. The symptoms start resolving in a few weeks and complete recovery usually occurs within two or three months.<ref>[https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6665093&dopt=Abstract Bouffée délirante] ((webarchive|url=https://web.archive.org/web/20070512142732/http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve |date=2007-05-12 ))</ref>

===brain fag syndrome===
((Main|Brain fag syndrome))
<!--Do not change this to "Brain fog syndrome". The syndrome spelled with an "a" is a distinct syndrome; it has its own wikipedia page (linked as the "main article" right below the entry's header). There is a separate entry right below this one for "Brain fog" spelled with an "o".-->Brain fag syndrome<ref name=Ola>((cite journal |vauthors=Ola BA, Morakinyo O, Adewuya AO |title=Brain Fag Syndrome - a myth or a reality |journal=Afr J Psychiatry (Johannesbg) |volume=12 |issue=2 |pages=135–43 |date=May 2009 |pmid=19582315 |doi= 10.4314/ajpsy.v12i2.43731|url=https://www.ajol.info/index.php/ajpsy/article/view/43731|doi-access=free ))</ref> is an example of a culture-bound syndrome. "Brain fag" was once a common term for mental exhaustion. Today, the syndrome describes students (predominantly males, particularly in West Africa) experiencing symptoms including somatic, sleep-related and cognitive complaints, head and neck pains, difficulty in concentrating and retaining information, and eye pain.

=== brain fog ===
Synonym of ((slink||clouding of consciousness)).

===bruxism===
((Main|Bruxism))
Bruxism refers to teeth grinding behavior that is usually seen in children.

==C==
===Capgras' syndrome or ''illusion des sosies''===
((Main|Capgras syndrome))
In [[Capgras syndrome]], the individual feels that a person familiar to them, usually a family member, has been replaced by an [[imposter]].<ref name=APP/> This is a type of [[delusion]] that can be experienced as part of [[schizophrenia]]. Capgras syndrome and several other related disorders are referred to as "[[delusional misidentification syndrome]]".

===catalepsy===
((Main|Catalepsy))
''Catalepsy'' is the term for [[catatonia|catatonic]] rigidity of the limbs which often results in abnormal posturing for long intervals.

===cataplexy===
((Main|Cataplexy))
Cataplexy refers to a sudden loss of muscle tone and is commonly precipitated by a strong emotional response.<ref name=APP/>

===catatonia===
((Main|Catatonia))
Catatonia involves a significant psychomotor disturbance, which can occur as [[catalepsy]], [[stupor]], excessive purposeless motor activity, extreme negativism (seemingly motiveless resistance to movement), [[mutism]], [[echolalia]] (imitating speech), or [[echopraxia]] (imitating movements).<ref name=APP/> There is a catatonic subtype of [[schizophrenia]].<ref name=APP/>

===''cerea flexibilitas''===
((Main|Cerea flexibilitas))
''Cerea flexibilitas'', meaning "waxy flexibility", refers to people allowing themselves to be placed in postures by others, and then maintaining those postures for long periods even if they are obviously uncomfortable.<ref name=APP/> It is characterized by an individual's movements having the feeling of a plastic resistance, as if the person were made of [[wax]]. This occurs in [[Diagnosis of schizophrenia#Sub-classifications|catatonic schizophrenia]], and a person with this condition can have their limbs placed in fixed positions as if the person were in fact made from wax.

===chorea===
((Main|Chorea (disease)))
Chorea refers to erratic involuntary movements. The term comes from the Greek word "''[[Chorea (dance)|choreia]]''" or "dance" since usually large groups of muscles are involved simulating dance-like movements.

===circumstantial speech===
((Main|Circumstantial speech))
Circumstantial thinking, or circumstantial speech, refers to a person being unable to answer a question without giving excessive, unnecessary detail.<ref name=Videbeck>((cite book |last=Videbeck |first=S |title= Psychiatric-Mental Health Nursing, 4th ed. |year=2008 |publisher= Wolters Kluwers Health, Lippincott Williams & Wilkins |location= Philadelphia))</ref> This differs from tangential thinking, in that the person does eventually return to the original point, circling back on-topic.

===clang association===
((Main|Clang association))
Clang associations are ideas that are related only by similar or rhyming sounds rather than actual meaning.<ref name=Videbeck/>

===Claparede's paradox===
''Claparede's paradox'' refers to retention of non-verbal and implicit memory in people with [[Korsakoff's syndrome]].<ref name=MacDonald>((cite web |url=http://www.psychopathology.org.uk |title=Glossary of Descriptive Psychopathology |author=MacDonald A Box O Klemperer F |year=2000 |publisher=Martin Dunitz, London |url-status=dead |archive-url=https://web.archive.org/web/20050927104838/http://www.psychopathology.org.uk/ |archive-date=2005-09-27 ))</ref>

===clouding of consciousness===
[[Clouding of consciousness]], also known as ''brain fog'' or ''mental fog'', is a global impairment in higher central nervous functioning. All aspects of [[cognitive]] functioning are affected. On [[mental status examination]]s it is manifest by [[disorientation]] in time, place and person, memory difficulties caused by failure to register and recall, [[aphasia]], and [[agnosia]]. Impaired [[perception]] functioning leads to [[illusion]]s and [[hallucinations]] often in the visual sensory modality. This then causes agitation and distress and secondary [[delusions]]. The term ''confusion state'' is sometimes used to mean clouding of consciousness, but is avoided whenever possible because it is ambiguous.

===coenestopathic state===
Coenestopathic state refers to a situation in which an individual in a coenestopathic state has a localized distortion of body awareness.

===confabulation===
((Main|Confabulation))
Confabulation is the confusion of imagination with memory, or the confusion of true memories with false memories.

===conversion disorder===
((Main|Conversion disorder))
Conversion disorder involves the unintentional production of symptoms or deficits affecting motor or sensory function that are not fully explained by a neurological or medical condition.<ref name=APP/> This can manifest as paralysis, for example. It generally involves psychological factors, and symptoms may worsen in the context of situational conflict.<ref name=APP/>

===coprolalia===
((Main|Coprolalia))
Coprolalia is the involuntary utterance of socially inappropriate phrases. It is a phonic tic associated with [[Tourette syndrome]], although less than 15% of persons with Tourette's have coprolalia.

===Cotard delusion===
((Main|Cotard delusion))
Cotard delusion involves the belief in an individual that one or more of their organs has changed in some way, has ceased functioning, or has disappeared entirely.<ref name=APP/>
This type of delusion is most commonly seen in patients with schizophrenia.<ref name=APP/>

==D==
===defenestration===
''[[Defenestration]]'' refers to an individual voluntarily ejecting themselves from a window or another elevated position, usually in the context of attempted suicide. Also see ((slink||autokabalesis)).<ref>MacDonald</ref>

===''déjà vu''===
In ''[[déjà vu]]'', a person feels undue familiarity to an event or a person.

=== ''déjà pensée'' ===
In ''déjà pensée'', a completely new thought is seen as familiar by an individual, as if it had occurred before. The sensation may be caused by a type of convulsion known as a "partial seizure" which occurs in parts of the temporal lobe or other areas of the brain - the individual typically remains conscious throughout.

===''dementia praecox''===
((Main|Dementia praecox))
''Dementia praecox'' refers to a chronic, deteriorating psychotic disorder characterized by rapid cognitive disintegration, usually beginning in the late teens or early adulthood.

===''dementia pugilistica''===
((Main|Dementia pugilistica))
''Dementia pugilistica'', also called "chronic traumatic encephalopathy", "pugilistic Parkinson's syndrome", "boxer's syndrome", and "punch-drunk syndrome", is a [[neurology|neurological]] disorder which affects career boxers and others who receive multiple dazing blows to the head. The condition develops over a period of years, with the average time of onset being about 16 years after the start of a career in boxing.

===derailment===
((Main|Derailment (thought disorder)))
Derailment, also known as loosening of associations, refers to disorganized thinking that jumps between ideas that seem entirely unrelated. Compare ((slink||akataphasia)), ((slink||asyndesis)), ((slink||entgleisen)), ((slink||flight of ideas)), ((slink||knight's move thinking)), and ((slink||logorrhoea)).<ref name=Videbeck/> It can be seen in individuals with [[schizophrenia]], as well as those experiencing [[mania]].<ref name=APP/>

=== dereistic thinking ===
''Dereistic'' means: away from reality, undirected fantasy thinking.<ref>((cite book|last1=Hillman & Shamdasani|first1=James & Sonu|title=Lament of the Dead, Psychology After Jung's Red Book|date=2013|publisher=W. W. Norton & Company|location=New York London|page=42|edition=First))</ref> [[Carl Jung]] wrote, "This is the basic activity of psychic life, this fantasy making", and he used the term ''image'' not from afterimage, something one has experienced or seen, but says he takes it from poetic usage.<ref>((cite book|url=https://books.google.com/books?id=rUZYvgAACAAJ|title=Psychological types|date=1921|isbn=9780691018133|edition=CW 6|page=743|last1=Jung|first1=Carl|publisher=Princeton University Press ))</ref> Dereistic thinking: An old descriptive term used to refer to thinking not in accordance with the facts of reality and experience and following illogical, idiosyncratic reasoning. This term is also used interchangeably with ((slink||autistic thinking)) though they are not exact synonyms: ''dereistic'' emphasizes disconnection from reality and ''autistic'' emphasizes preoccupation with inner experience.

===''dermatozoenwahn''===
Alternate term for organic hallucinosis and [[delusional parasitosis]], the continuous belief that one's skin or body has been infested by parasites or insects. This state cannot be diagnosed if the hallucinatory state is produced while the individual is under the influence of drugs or alcohol, or if the individual fulfills the criterion for [[delirium tremens|delirium]]. In general, if an individual is under the influence of a drug, or experiencing the symptoms of withdrawal from that drug, this condition is not psychiatric but medical, and termed ''[[formication]]''.

===dhat===
((Main|Dhat syndrome))
Dhat syndrome refers to a complaint of premature ejaculation or impotence and a false belief that semen is being passed in the urine.

===doppelgänger===
((Main|Doppelgänger))
The doppelgänger is a phenomenon in which the afflicted believe that their exact "double" is present alongside them all the time and goes with them wherever they go.

==E==
===''écho de la pensée''===
In ''écho de la pensée'', meaning "thought echo" in French, thoughts seem to be spoken aloud just ''after'' being produced. The individual hears the "echo" of their thoughts in the form of a voice after they have made the thought. See also ''((slink||gedankenlautwerden))'' and ''((slink||thought sonorization))''.

===''entgleisen''===
From German ''entgleisen'' "to derail". Alternate term used for [[Derailment (thought disorder)|derailment of thought]] (a morbid form of loosening of association or [[asyndesis]]). A [[Carl Schneider|Schneiderian]] term by origin. In this form of thought the individual jumps from one topic to another during conversation and both topics have literally no connection with each other. This is in contrast with [[flight of ideas]] where connection is present between one topic and another. Compare ((slink||akataphasia)), ((slink||asyndesis)), and ((slink||derailment)).

===extracampine===
Extracampine [[hallucinations]] are hallucinations beyond the possible sensory field, e.g., an individual "seeing" somebody standing behind them is a visual extracampine hallucination experience.<ref>
((cite book | last1 = Lewis | first1 = Stephen | last2 = Escalona | first2 = Rodrigo | last3 = Keith | first3 = Samuel | editor1-last = Sadock | editor1-first = Virginia | editor2-last = Sadock | editor2-first = Benjamin | editor3-last = Ruiz | editor3-first = Pedro | title = Kaplan and Sadock's Comprehensive Textbook of Psychiatry | publisher = Wolters Kluwer | chapter = 12 Shizophrenia and Other Psychotic Disorders | at = 12.2 Phenomenology of Schizophrenia, Psychotic Symtoms, Auditory Hallucinations ))</ref><ref>
((cite book | last1 = O'Shea | first1 = Brian | year = 2010 | url = http://www.irishpsychiatry.ie/wp-content/uploads/2017/02/Textbook-of-Psychological-Medicine-5th-Edition.pdf | title = Textbook of Psychological Medicine | edition = 5th | editor-last1 = O'Shea | editor-first1 = Brian | publisher = The College of Psychiatry of Ireland | chapter = 1 Assessing, Describing, and Classifying | at = Symptomatology, p. 30 | archive-url = https://web.archive.org/web/20171031154313/http://www.irishpsychiatry.ie/wp-content/uploads/2017/02/Textbook-of-Psychological-Medicine-5th-Edition.pdf | archive-date = 2017-10-31 | url-status = live ))</ref><ref name="Sato">((cite journal |last1=Sato |first1=Y. |last2=Berrios |first2=G. E. |title=Extracampine hallucinations |url=https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(03)13128-5/fulltext |journal=The Lancet |access-date=8 June 2020 |pages=1479–1480 |language=en |doi=10.1016/S0140-6736(03)13128-5 |date=26 April 2003|volume=361 |issue=9367 |pmid=12727431 |s2cid=205939829 ))</ref>

==F==
===fantasy===
((Main|Fantasy (psychology)))
Fantasy is imagining that expresses desires and aims.

===fatuous affect===
The moods of an individual with fatuous affect resemble the moods of a child. This condition is seen in [[hebephrenic|hebephrenic schizophrenia]].((Citation needed|date=November 2021))

===flight of ideas===
"Flight of ideas" describes excessive speech at a rapid rate that involves causal association between ideas. Links between ideas may involve usage of puns or rhymes.<ref name=Videbeck/><ref>((cite web |url=http://www.gpnotebook.co.uk/simplepage.cfm?ID=268828679&linkID=21084&cook=yes |title=flight of ideas |access-date=2015-02-28 |url-status=live |archive-url=https://web.archive.org/web/20150402110318/http://www.gpnotebook.co.uk/simplepage.cfm?ID=268828679&linkID=21084&cook=yes |archive-date=2015-04-02 ))</ref> It is typical of [[mania]], classically seen in [[bipolar disorder]].<ref name=Videbeck/> Compare ((slink||derailment)).

===''folie à deux''===
((Main|Folie à deux))
Also called "induced psychosis", ''folie à deux'' is a delusional disorder shared by two or more people who are closely related emotionally. One has real psychosis while the symptoms of psychosis are induced in the other or others due to close attachment to the one with psychosis. Separation usually results in symptomatic improvement in the one who is not psychotic.

''Folie communiquée'', ''folie imposée'', ''folie induite'', and ''folie simultanée'' are the four subtypes of ''folie à deux''.

;''folie communiquée''
''Folie communiquée'', or subtype C of ''folie à deux'', occurs when a normal person has a contagion of their ideas after resisting them for a long time. Once they acquire these beliefs they maintain them despite separation.

;''folie imposée''
''Folie imposée'', or subtype A of ''folie à deux'', is the most common form in which the dominant person imposes a [[delusion]] into a person who was not previously mentally ill. Separation of the two results in improvement of the non-dominant person.

;''folie induite''
In ''folie induite'', or subtype D of ''folie à deux'', a person who is already psychotic adds the delusions of a closely associated person to their own.

;''folie simultanée''
In ''folie simultanée'', or subtype B of ''folie à deux'', a delusional system emerges simultaneously and independently in two closely related persons, and the separation of the two would not be beneficial in the resolution of psychopathology.

===Fregoli delusion===
((Main|Fregoli delusion))
In Fregoli delusion, a person has a delusional belief that various different people are in fact a certain other person, even if there is no physical resemblance.<ref name=APP/>

Fregoli syndrome is considered a form of delusional misidentification "in which the false identification of familiar people occurs in strangers".<ref>(Symptoms in the Mind 2nd Edition 1995 by Andrew Sims)</ref>

==G==
===''gedankenlautwerden''===
In ''Gedankenlautwerden'', an individual hears thoughts spoken aloud. Thoughts are heard in the form of a voice at the same time as they are thought, not afterwards. See also ''((slink||écho de la pensée))'' and ''((slink||thought sonorization))''

===''gegenhalten''===
''[[Gegenhalten]]'' is a [[catatonic]] phenomenon in which the subject opposes all passive movements with the same degree of force as applied by the examiner. It is slightly different from ((slink||negativism)) in which the subject does exactly the opposite to what is asked in addition to showing resistance.

==H==
===hemiasomatognosia===
Hemiasomatognosia is a subtype of [[anosognosia]] in which the person with [[hemiplegia]] neglects one half of their body.

===hyposchemazia; aschemazia===
Hyposchemazia is characterized by the reduced awareness of one's [[body image]] and aschemazia by the absence of it. These disorders can have many varied causes such as physical injuries, mental disorders, or mental or physical states. These include transection of the [[spinal cord]], [[parietal lobe]] lesions (e.g. right middle cerebral artery thrombosis), [[anxiety]], depersonalization, epileptic auras, [[migraine]]s, sensory deprivation, and [[Vertigo (medical)|vertigo]] (i.e. "floating on air").

==I==
===''idée fixe''===
''Idée fixe'' is an alternate term for an overvalued idea. In this condition, a belief that might seem reasonable both to the individual and to other people comes to dominate completely the individual's thinking and life.

===ideas of alienation===
Thoughts that one's own body part or action is not of one's own.

===ideas of influence===
Thoughts that one's own action is caused by someone else's will or some other external cause.

===ideas of reference===
((Main|Ideas of reference and delusions of reference))
Ideas of reference are a delusional belief that general events are personally directed at oneself.<ref name=Videbeck/>

===illusion===
An illusion is a false [[perception]] of a detectable stimulus.<ref name=APP/>

==J==
===jargon aphasia===
[[Jargon aphasia]] is characterized by incoherent, meaningless speech with neologisms (newly invented words). These are unconscious thoughts that find expression when one is off one's guard and must be consciously repressed.

==K==
===Klüver–Bucy syndrome===
((Main|Klüver–Bucy syndrome))
In [[Klüver–Bucy syndrome]], an individual will display placidity, [[hyperorality]], [[hypersexuality]], and [[hyperphagia]]. This condition results from bilateral destruction of the amygdaloid bodies of the [[limbic system]].

===knight's move thinking===
[[Knight's move thinking]] is a complete loosening of associations where there is no logical link between one idea and the next. Based on a [[knight (chess)|knight]] on a chessboard where the movement can be any ''L'' shaped direction, making it difficult to track. Compare ((slink||derailment)).<ref>((cite web |url=http://www.gpnotebook.co.uk/simplepage.cfm?ID=-1737818073 |title=knight's move thinking |access-date=2015-02-28 |url-status=live |archive-url=https://web.archive.org/web/20150924023318/http://www.gpnotebook.co.uk/simplepage.cfm?ID=-1737818073 |archive-date=2015-09-24 ))</ref>((Citation needed|date=October 2008))

===''koro''===
((Main|Koro (medicine)))
''Koro'' is a culture-specific syndrome, generally seen only among Chinese people. It involves a panicked feeling that one's genitals are retracting into the abdomen, and that this will result in death.<ref name=APP/>

===kuru===
((Main|Kuru (disease)))
Kuru (also known as "laughing sickness" due to the outbursts of laughter that mark its second phase) was first noted in New Guinea in the early 1900s. Kuru is now known to be a [[prion]] disease, one of several known [[transmissible spongiform encephalopathy|transmissible spongiform encephalopathies]].

==L==
===''latah''===
''[[Latah]]'' is a culture-specific syndrome usually seen in [[Southeast Asia]] and involves startle-induced disorganization, hypersuggestibility, automatic obedience, and [[echopraxia]] (a tendency to mimic examiner's or other person's actions). It is usually associated with women.
There is controversy over whether Latah is a real psychiatric condition, or merely a display of exhibitionism that would otherwise not be socially acceptable.

===''l'homme qui rit''===
In ''l'homme qui rit'' (from the French, meaning "the man who laughs"), an individual displays inappropriate laughter accompanied by release phenomena of the frontal subdominant lobe.

===Lilliputian hallucinations===
((Main|Alice in Wonderland syndrome))
Lilliputian hallucinations are characterized by abnormal perception of objects as being shrunken in size but normal in detail. Usually seen in [[delirium tremens]].

===logoclonia===
In logoclonia, the individual often repeats the last syllable of a word. Compare [[echolalia]]. Often a symptom of Alzheimers or Parkinson's disease.

===logorrhoea===
Logorrhoea, also known as "[[verbosity|volubility]]", is characterized by fluent and rambling speech using numerous words. Compare ((slink||derailment)).

==M==
===mania===
((main|Mania))
Mania is often mirrored as a minor image of depression. Mania is a state abnormally elevated arousal, affected, and energy level. As mania intensifies, irritability can be more pronounced and result in anxiety or violence. Mania symptoms are elevated mood, flights of ideas, pressure of speech, increased energy, decreased need or desire for sleep, and hyperactivity.

===''mania a potu''===
''Mania a potu'' is an alcohol intoxication state with violent and markedly disinhibited behavior. This condition is different from violent behavior in otherwise normal individuals who are intoxicated.

=== metonymy ===
[[Metonymy]] is a speech disturbance in which patients, commonly with [[schizophrenia]], use inappropriate words or expressions that are related to the proper ones.  Examples include: consume a menu, instead of a meal; lose the piece of string of the conversation, not the thread of the conversation.  See also ((slink||word approximation)).<ref>
((harvp | APA Dictionary of Psychology |2015 | p = 649 ))</ref><ref>
((harvp | Kaplan and Sadock's Concise Textbook of Clinical Psychiatry | 2008 | at = GLOSSARY OF SIGNS AND SYMPTOMS, p. 28 ))</ref>

===''mitgehen''===
''Mitgehen'' (((IPA-de|ˈmɪtˌɡeːən|lang|De-mitgehen.ogg))) is an extreme form of ''mitmachen'' in which very slight pressure leads to movement in any direction, also called the "anglepoise" effect or "anglepoise lamp sign". This movement occurs despite instructions to resist the pressure, as individuals with this condition often experience even slight pressure as forcible grasping and pushing.

===''mitmachen''===
In ''mitmachen'' (((IPA-de|ˈmɪtˌmaxn̩|lang|De-mitmachen.ogg))), one's body can be put into any posture, despite instructions given to resist. Compare ((slink||mitgehen)).

===''moria''===
''Moria'' is the condition characterized by euphoric behavior, such as frivolity and the inability to act seriously. In addition, there is a lack of foresight and a general indifference. It is found in frontal lobe lesions, often along with ((slink||witzelsucht)), particularly when the orbital surface is damaged. Recent research has shown its presence in [[frontotemporal dementia]].

==N==
===negativism===
Resistance to attempts to move the subject, who then does the opposite of what is asked. Negativism is usually a sign of [[catatonia]], and may progress to (catatonic) rigidity. It is slightly different from ((slink||gegenhalten)), in which the individual resists movement but does not perform the opposite movement. Also see: [[oppositional defiance disorder]] (ODD).

=== neologism ===
In a neurological or psychopathological context, ''[[neologisms]]'' are nonsensical words or phrases whose origins are unrecognizable, and are associated with [[aphasia]] or [[schizophrenia]]. Incorrectly constructed words whose origins are understandable may also be called neologisms, but are more properly referred as ((slink||word approximation))s.<ref>
((cite book | ref = ((harvid | APA Dictionary of Psychology |2015 )) | editor-last1 = VandenBos | editor-first1 = Gary R | year = 2015 | edition = 2nd | title = APA Dictionary of Psychology | location = Washington, DC | publisher = American Psychological Association | isbn = 978-1-4338-1944-5 | doi = 10.1037/14646-000 | page = 696 ))</ref><ref>
((cite book | ref = ((harvid | Kaplan and Sadock's Concise Textbook of Clinical Psychiatry | 2008 )) | last1 = Sadock | first1 = B. J. | last2 = Sadock | first2 = VA | title = Kaplan and Sadock's Concise Textbook of Clinical Psychiatry | year = 2008 | publisher = Lippincott Williams & Wilkins | isbn = 9780781787468 | chapter = 4 Signs and Symptoms in Psychiatry | at = GLOSSARY OF SIGNS AND SYMPTOMS, p. 29 ))</ref>

==O==
===omega sign===
The omega sign is the occurrence of a fold (like the Greek letter [[omega]], Ω ) in the forehead, above the nose, produced by the excessive action of the [[Corrugator supercilii muscle|corrugator muscle]]. It is sometimes seen in [[Clinical depression|depression]].

===oneiroid state===
From Greek ''oneiros'' as meaning "dream". In an [[oneiroid state]] one feels and behaves as though in a dream. Also known as "[[oneirophrenia]]" as described by [[Ladislas J. Meduna]].

===oneirophrenia===
See ((slink||oneiroid state)) or [[oneirophrenia]].

===overvalued idea===
Overvalued ideas are exaggerated [[beliefs]] that a person sustains beyond reasons, but are not as unbelievable and are not as persistently held as [[delusions]].<ref name="Disturbances in Thought Contents 2017">
((cite book | ref = ((harvid | Clinical Manifestations of Psychiatric Disorders | 2017 )) | last1 = Matorin | first1 = Anu A | last2 = Shah | first2 = Asim A | last3 = Ruiz | first3 = Pedro | editor1-last = Sadock | editor1-first = Virginia A | editor2-last = Sadock | editor2-first = Benjamin J | editor3-last = Ruiz | editor3-first = Pedro | year = 2017 | title = Kaplan & Sadock's Comprehensive Textbook of Psychiatry | edition = 10th | isbn = 978-1-4511-0047-1 | publisher = Wolters Kluwer | chapter = 8 Clinical Manifestations of Psychiatric Disorders | at = THINKING DISTURBANCES, Thought Content, Disturbances in Thought Contents.))</ref><ref>
((harvp | APA Dictionary of Psychology |2015 | p = 752. ))</ref> 
Preoccupation with spouse's possible [[infidelity]] can be an overvalued idea if no evidence exists to arouse suspicion.
[[Body dysmorphic disorder]]'s obsessive preoccupation that some aspect of one's own appearance is severely flawed is another example of an overvalued idea.<ref name="Disturbances in Thought Contents 2017" />

==P==
===palilalia===
((Main|Palilalia))
[[Palilalia]] is characterized by the repetition of a word or phrase; i.e., the subject continues to repeat a word or phrase after once having said. It is a form of ((slink||perseveration)).

===palinacousis===
In [[palinacousis]] the subject continues to hear a word, a syllable or any sound, even after the withdrawal of stimulus. It is a type of ((slink||perseveration)).

===palinopsia===
((Main|Palinopsia))
In palinopsia a visual image persists after the stimulus has gone (similar to an [[afterimage]] seen after looking into a bright light).

===parapraxis===
((Main|Freudian slip))
A Freudian slip, or parapraxis, is an error in speech, memory or physical action that is believed to be caused by the unconscious mind.

===paraprosopia===
A delusion in which a person believes they have seen a face transform into a grotesque form – often described as a 'monster', 'vampire', 'werewolf' or similar. This is very rare and most likely to be described by people with schizophrenia.

===paraschemazia===
Paraschemazia is characterized by a distortion of body image. It can be caused by hallucinogenic drugs such as [[LSD]] and [[mescalin]], epileptic auras, and sometimes migraines.

===pareidolia===
((Main|Pareidolia))
In pareidolia a vague or random stimulus is mistakenly perceived as recognizable. Pareidolia is a type of illusion and hence called "pareidolic illusion".

===perseveration===
((Main|Perseveration))
This term refers to uncontrollable repetition of a particular response, such as a word, phrase, or gesture, despite the absence or cessation of the original stimulus.<ref name="Helm-Estabrooks">((cite journal |author=Helm-Estabrooks N |title=The problem of perseveration |journal=Semin Speech Lang |volume=25 |issue=4 |pages=289–90 |year=2004 |pmid=15599818 |doi=10.1055/s-2004-837241 |doi-access=free ))</ref> Usually it is seen in organic disorders of brain, head injury, delirium or dementia, however can be seen in schizophrenia as well.

===''pfropfschizophrenie''===
This refers to schizophrenia in people with mild learning disabilities.<ref>((cite journal |year=1998 |title=Pfropfschizophrenie Revisited: Schizophrenia in People with Mild Learning Disability |journal=The British Journal of Psychiatry |volume=173 |pages=145–153 |url=http://bjp.rcpsych.org/cgi/content/abstract/173/2/145 |doi=10.1192/bjp.173.2.145 |pmid=9850227 |last1=Doody |first1=GA |last2=Johnstone |first2=EC |last3=Sanderson |first3=TL |last4=Owens |first4=DG |last5=Muir |first5=WJ |issue=2 |s2cid=30361647 |url-status=live |archive-url=https://web.archive.org/web/20110719165815/http://bjp.rcpsych.org/cgi/content/abstract/173/2/145 |archive-date=2011-07-19 ))</ref>

===''piblokto''===
((Main|Piblokto))
''Piblokto'', ''pibloktoq'', or Arctic hysteria, is a condition exclusively appearing in Inuit societies living within the Arctic Circle. Appearing most prevalently in winter, it is considered to be a form of a culture-specific disorder.<ref>((cite journal |url=https://soar.wichita.edu/handle/10057/1641 |title=Nutritional ecology: a new perspective. |author=Taylor, S. |author2=Shelor, N. |author3=Abdelnour, M. |year=1972 |journal=Lambda Alpha Journal of Man |volume=4 |issue=1 |pages=47–59|access-date=2013-04-06 |url-status=live |archive-url=https://web.archive.org/web/20160304113853/http://soar.wichita.edu/xmlui//handle/10057/1641 |archive-date=2016-03-04 ))</ref>

Symptoms can include intense "[[hysteria]]" (including screaming and uncontrolled wild behavior), depression, [[coprophagia]], and insensitivity to extreme cold.<ref>((cite journal |url=http://soar.wichita.edu/handle/10057/1813 |title=Two Perspectives on the etiology of pibloktoq |year=1989 |first=Janet |last=Lister |journal=Lambda Alpha Journal of Man |volume=20 |pages=111–129|access-date=2013-04-06 |url-status=live |archive-url=https://web.archive.org/web/20160304113751/http://soar.wichita.edu/handle/10057/1813 |archive-date=2016-03-04 ))</ref> This condition is most often seen in [[Inuit]] women.<ref>((cite web |url=http://www.sequeltsi.com/files/library/Understanding_Cultural_Identity.pdf |title=Focusing on culture and ethnicity in America |last=Ruiz |first=Pedro |work=Paradigm |year=2007 |access-date=2013-04-06 |url-status=dead |archive-url=https://web.archive.org/web/20120326002708/http://www.sequeltsi.com/files/library/Understanding_Cultural_Identity.pdf |archive-date=2012-03-26 ))</ref>

=== poverty of ideas ===
Often associated with [[schizophrenia]], [[dementia]], and severe depression, ''poverty of ideas'' is a thought disturbance in which thought spontaneity and productivity are reduced, and are seen in speech that is vague, has many simple or meaningless repetitions, or full of stereotyped phrases.<ref>
((harvp | APA Dictionary of Psychology |2015 | p = 816 )) "'''poverty of ideas''' a thought disturbance, often associated with schizophrenia, dementia, and severe depression, in which there is reduced spontaneity and productivity of thought as evidenced by speech that is vague or full of simple or meaningless repetitions or stereotyped phrases."</ref>

===''pseudologia fantastica''===
''[[Pseudologia fantastica]]'' is a condition in which a person grossly exaggerates their symptoms or even tells a lie about their symptoms in order to get medical attention. Seen in [[malingering]] and [[Munchausen syndrome]].

===psychological pillow===
Where the individual holds their head a few centimetres above the bed. No explanation is offered for this. It is a symptom of catatonia and can last for many hours.

===psychopathology===
((Main|Psychopathology))
Psychopathology is a term which refers to either the study of mental illness or mental distress or to
the manifestation of behaviours and experiences which may be indicative of mental illness or psychological impairment.

==R==
===rabbit syndrome===
[[Rabbit syndrome]] is characterized by rapid, vertical, rhythmic movements of lips so that it resembles a rabbit chewing.<ref name=MacDonald/> It is a type of extrapyramidal symptom, distinct from tardive dyskinesia as it spares the tongue and involves vertical movements only.<ref name="Schwartz 2004">((cite journal |last1=Schwartz |first1=Miguel |last2=Hocherman |first2=Shraga |title=Antipsychotic-Induced Rabbit Syndrome |journal=CNS Drugs |date=April 2004 |volume=18 |issue=4 |pages=213–220 |doi=10.2165/00023210-200418040-00002|pmid=15015902|s2cid=11451531 ))</ref>

===reduplicative hallucination===
In reduplicative hallucinations there is the perception of seeing a double. Particular kinds of reduplicative hallucination include [[autoscopy]], [[heautoscopy]] and [[out-of-body experiences]].

===reduplicative paramnesia===
[[Reduplicative paramnesia]] is a [[delusional misidentification syndrome]] in which one's surroundings are believed to exist in more than one physical location.

===reflex hallucination===
Reflex hallucinations occur when true sensory input in one sense leads to production of a hallucination in another sense, e.g. seeing a doctor writing (visual) and then feeling him writing across one's stomach (tactile).

===restlessness===
Restlessness has two components: [[akathisia]] (subjective "inner" restlessness) and [[psychomotor agitation]] (an excess of motor activity).

===retardation===
Mental retardation (more commonly referred to as [[intellectual disability]]<ref name="DSM-5">((Cite book |author=American Psychiatric Association |title=Diagnostic and Statistical Manual of Mental Disorders |publisher=American Psychiatric Publishing |year=2013 |isbn=978-0-89042-555-8 |edition=Fifth |location=Arlington, VA |page=[https://archive.org/details/diagnosticstatis0005unse/page/809 809] |chapter=Highlights of Changes from DSM-IV to DSM-5 |doi=10.1176/appi.books.9780890425596 |hdl=2027.42/138395 |chapter-url=https://archive.org/details/diagnosticstatis0005unse/page/809 ))</ref><ref name="Ansberry">((Cite web |last=Ansberry |first=Clare |date=20 November 2010 |url=https://www.wsj.com/articles/SB10001424052748704865104575588273153838564 |title=Erasing a Hurtful Label From the Books |work=[[The Wall Street Journal]] |access-date=4 December 2010 |quote=Decades-long quest by disabilities advocates finally persuades state, federal governments to end official use of 'retarded'. |url-status=live |archive-url=https://web.archive.org/web/20150627145120/http://www.wsj.com/articles/SB10001424052748704865104575588273153838564 |archive-date=27 June 2015 ))</ref>) is a term used when a person has certain limitations in mental functioning and in skills such as communicating, taking care of themselves, and social skills.

In children, these limitations will cause a child to learn and develop more slowly than a typical child. Children with intellectual disability may take longer to learn to speak, walk, and take care of their personal needs such as dressing or eating. They are likely to have trouble learning in school. They will learn, but it will take them longer. There may be some things they cannot learn.<ref>((cite web|url=http://www.nichcy.org/pubs/factshe/fs8txt.htm |title=Disability Info: Mental Retardation Fact Sheet (FS8) |publisher=Nichcy.org |access-date=2019-03-25))</ref>

===left–right disorientation===
Left–right disorientation is one of the four cardinal signs of [[Gerstmann syndrome|Gerstmann's syndrome]].

==S==
===scanning speech===
[[Scanning speech]] is an [[ataxic]] dysarthria in which syllable durations are equalized. It is characteristic of the [[dysarthria]] of [[multiple sclerosis]]. Together with [[Pathologic nystagmus|nystagmus]] and [[intention tremor]] it forms [[Charcot's triad 1]].

===schizophasia===
((Main|Schizophasia))
Schizophasia, commonly referred to as [[word salad]], is confused, and often repetitious, language that is symptomatic of various [[mental illness]]es.<ref>((cite journal | author = Berrios G.E. | year = 1999 | title = Falret, Séglas, Morselli and Masselon, and the "Language of the Insane": a conceptual history | journal = Brain and Language | volume = 69 | issue = 1| pages = 56–75 | doi=10.1006/brln.1999.2042| pmid = 10452814 | s2cid = 30044044 ))</ref>

===''schnauzkrampf''===
A ''schnauzkrampf'' is a grimace resembling pouting sometimes observed in catatonic individuals.

===''sensitiver beziehungswahn''===
''Sensitiver beziehungswahn'', is an alternate term for ideas of reference. In this the person thinks as people are talking about them or observing them or a talk is going on about them on television or radio. Seen in [[social anxiety disorder|social phobia]], [[Clinical depression|depression]], [[delusional disorder]] and in [[schizophrenia]] where they are often present up to a delusional extent.

===Stockholm syndrome===
((Main|Stockholm syndrome))
The Stockholm syndrome is a [[psychology|psychological]] response sometimes seen in a hostage, in which the hostage exhibits loyalty to the hostage-taker, in spite of the danger (or at least risk) in which the hostage has been placed.<ref>((cite journal |pmid= 18028254 |title= 'Stockholm Syndrome': psychiatric diagnosis or urban myth?|vauthors=Namnyak M, Tufton N, Szekely R, Toal M, Worboys S, Sampson EL |date= November 19, 2007 |doi= 10.1111/j.1600-0447.2007.01112.x |volume=117 |issue=1 |journal= [[Acta Psychiatr Scand]] |pages=4–11|s2cid= 39620244))</ref> Stockholm syndrome is also sometimes discussed in reference to other situations with similar tensions, such as [[battered person syndrome]],<ref>((cite journal | author = Dutton D.G, Painter S.L. | year = 1981 | title = Traumatic bonding: the development of emotional attachments in battered women and other relationships of intermittent abuse | journal = Victimology| volume = 1 | issue = 4| pages = 139–155 | title-link = Traumatic bonding ))</ref> [[Parental Alienation Syndrome|child abuse cases]], and [[bride kidnapping]].

===synaesthesiae===
Also spelled ''synæsthesia'', ''synaesthesia'', or ''synesthesia—plural synesthesiae'', from the Greek ''syn-'' meaning "union" and ''aesthesis'' meaning "sensation", it is a neurological phenomenon in which two or more bodily senses are coupled.

==T==
===telegrammatic or telegraphic speech===
((Main|Telegraphic speech))
In telegraphic speech [[Grammatical conjunction|conjunctions]] and [[Article (grammar)|articles]] are missed out; meaning is retained and few words are used.

===thought blocking===
((Main|Thought blocking))
Thought blocking, also referred to as ''thought withdrawal'', refers to an abrupt stop in the middle of a train of thought; the individual might or might not be unable to continue the idea.<ref name=Videbeck/> This is a type of formal thought disorder that can be seen in schizophrenia.<ref name=APP/>

=== thought sonorization ===
<!--'Thought sonorization' redirects here-->
A combined term for ((slink||gedankenlautwerden)) and ((slink||écho de la pensée)) ("thought echo")

===torpor===
''[[Torpor]]'' in [[psychopathology]] is usually taken to mean profound inactivity not caused by reduction in [[consciousness]].

===Tourette syndrome===
[[Tourette syndrome]] (abbreviated as TS or Tourette's) is a common neurodevelopmental disorder that begins in childhood or adolescence. It is characterized by multiple movement (motor) tics and at least one vocal (phonic) tic. Common tics are blinking, coughing, throat clearing, sniffing, and facial movements. These are typically preceded by an unwanted urge or sensation in the affected muscles, can sometimes be suppressed temporarily, and characteristically change in location, strength, and frequency. Tourette's is at the more severe end of a spectrum of tic disorders. The tics often go unnoticed by casual observers.

===traumatic bonding===
[[Traumatic bonding]] occurs as the result of ongoing [[cycle of abuse|cycles of abuse]] in which the intermittent reinforcement of reward and punishment creates powerful emotional bonds that are resistant to change.<ref name="Sanderson2008">((cite book | last=Sanderson | first=C. | title=Counselling Survivors of Domestic Abuse | publisher=Jessica Kingsley Publishers | year=2008 | isbn=978-1-84642-811-1 | oclc=290811566 | url=https://books.google.com/books?id=5vA42Opyx9cC&pg=PA84 | page=84))</ref>

=== trichotillomania ===
Also known as "hair pulling disorder", [[trichotillomania]] (TTM) is an impulse control disorder characterised by a long term urge that results in the pulling out of one's hair. This occurs to such a degree that hair loss can be seen. Efforts to stop pulling hair typically fail. Hair removal may occur anywhere; however, the head and around the eyes are most common. The hair pulling is to such a degree that it results in distress

==V==
===verbigeration===
Verbigeration is a verbal [[stereotypy]] (repetition) in which usually one or several sentences or strings of fragmented words are repeated continuously. Sometimes individuals will produce incomprehensible jargon in which stereotypies are embedded. The tone of voice is usually monotonous. This can be produced spontaneously or precipitated by questioning. The term ''verbigeration'' was first used in psychiatry by Karl Kahlbaum in 1874, and it referred to a manner of talking which was very fast and incomprehensible. At the time verbigeration was seen as a "disorder of language" and represented a central feature of catatonia. The word is derived from the Latin word ((Lang|la|verbum)) (also the source of ''verbiage''), plus the verb ''((Lang|la|gerĕre))'', to carry on or conduct, from which the Latin verb ''((Lang|la|verbigerāre))'', to talk or chat, is derived. However, clinically the term ''verbigeration'' never achieved popularity and as such has virtually disappeared from psychiatric terminology. Compare [[Echolalia]].<ref>((cite journal | last1=Kaufmann | first1=Cornelia | last2=Agalawatta | first2=Neelya | last3=Malhi | first3=Gin S | title=Catatonia: Stereotypies, mannerisms and perseverations | journal=Australian & New Zealand Journal of Psychiatry | publisher=SAGE Publications | volume=52 | issue=4 | date=2018-03-23 | issn=0004-8674 | doi=10.1177/0004867418765669 | pages=391–393 | pmid=29569489| s2cid=38948769 ))</ref>

===''verstimmung''===
Refers to an ill-humored mood state often accompanied by low mood and depressive symptoms. The people surrounding the individual often feel upset by this condition.

===''vorbeigehen''; ''vorbeireden''===
In ''vorbeigehen'' or ''vorbeireden'', an individual will answer a question in such a way that it is clear the question was understood, though the answer itself is very obviously wrong. For example: "How many legs does a dog have?" – "Six".
This condition occurs in [[Ganser syndrome]] and has been observed in prisoners awaiting [[Trial (law)|trial]]. ''Vorbeigehen'' (((IPA-de|foːɐ̯ˈbaɪ̯ˌɡeːən|lang|De-vorbeigehen.ogg)), ''giving approximate answers'') was the original term used by Ganser but Vorbeireden (talking past the point) is the term generally in use (Goldin 1955). This behavior is also seen in people trying to feign psychiatric disorders (hence its association with prisoners).<ref>((citation |url=http://www.psyter.org/allegati/178/di_fiorino_8.pdf |title=Vorbeireden & Vorbeigehen |archive-url=https://web.archive.org/web/20061128163541/http://www.psyter.org/allegati/178/di_fiorino_8.pdf |archive-date=2006-11-28 ))</ref>

==W==
===''wahneinfall''===
''[[delusional intuition|Wahneinfall]]'' is an alternate term for autochthonous delusions or delusional intuition. This is one of the types of primary delusions in which a firm belief comes into the individual's mind "out of the blue" or as an intuition, hence called "delusional intuition". Other types of primary delusions include delusional mood (or atmosphere), delusional (apophanous) perception and delusional memories. Care is taken not to impugn an otherwise-rational individual's [[Feeling#Gut|instinctive]] aversion or inexpressible sense of or belief about a thing by dismissing it as ''wahneinfall''.

===waxy flexibility===
[[Waxy flexibility]], also known as ((slink||cerea flexibilitas)), is characterized by an individual's movements having the feeling of a plastic resistance, as if the person were made of wax. This occurs in catatonic schizophrenia, and a person with this condition can have his limbs placed in fixed positions as if the person were in fact made from wax.

===waxy rigidity===
Compare ((slink||mitmachen)) and ((slink||waxy flexibility)).

===Windigo psychosis===
((Main|Wendigo))
Windigo (also [[Wendigo]], Windago, Windiga, Witiko, and numerous other variants) psychosis is a culture-bound disorder which involves an intense craving for human flesh and the fear that one will turn into a cannibal. This was alleged to have occurred among Algonquian Indian cultures.

===''witzelsucht''===
''[[Witzelsucht]]'' is a tendency to tell inappropriate jokes and creating excessive facetiousness and inappropriate or pointless humor. It is seen in frontal lobe disorders usually along with ((slink||moria)). Recent research has shown that it may also be seen in [[frontotemporal dementia]].<ref name="Mendez 2008">((cite journal |author1=Mendez M. |author2=Lauterbach E. |author3=Sampson S. | year = 2008 | title = An evidence-based review of the psychopathology of frontotemporal dementia: a report of the ANPA Committee on Research | journal = The Journal of Neuropsychiatry and Clinical Neurosciences | volume = 20 | issue = 2| pages = 130–149 | doi=10.1176/jnp.2008.20.2.130|pmid=18451185 ))</ref>

=== word approximation ===
Usage of words in an unconventional or inappropriate way (as in ((slink||metonymy))), or usage of new but understandable words that are conventionally constructed, contrasting with ((slink||neologism))s, which are new words whose origins cannot be understood.<ref>
((harvp | APA Dictionary of Psychology |2015 | p = 1161 )) "'''word approximation''' a speech disturbance in which conventional words are used in unconventional or inappropriate ways (as in metonymy), or new but understandable words are constructed out of ordinary words (e.g., easify for simplify)."</ref><ref>
((harvp | Kaplan and Sadock's Concise Textbook of Clinical Psychiatry | 2008 | at = GLOSSARY OF SIGNS AND SYMPTOMS, p. 32 )) "'''word approximation''' Use of conventional words in an unconventional or inappropriate way (metonymy) or of new words that are developed by conventional rules of word formation (e.g., "handshoes" for gloves and "time measure" for clock); distinguished from a neologism, which is a new word whose derivation cannot be understood. See also paraphasia."</ref>

===word-salad===
Word salad (derived from the ((Lang-de|Wortsalat))) is characterized by confused, and often repetitious, language with no apparent meaning or relationship attached to them. It is often symptomatic of various mental illnesses, such as psychoses, including schizophrenia. Compare ((slink||derailment)).

===''würgstimme''===
''Würgstimme'' refers to speaking in an odd muffled or strangled voice. It is mainly seen in schizophrenia.

==Z==

=== Zeitraffer ===
Zeitraffer (((IPA-de|ˈt͡saɪ̯tˌʁafɐ|lang|De-Zeitraffer.ogg))) phenomenon, which translates to "time-lapse" in English, highlights how events, objects, and processes change and evolve over time, sometimes in ways that are imperceptible in real-time.

From a philosophical perspective, Zeitraffer can be related to various philosophical themes:

1. Temporality: It raises questions about the nature of time, whether it is continuous or discrete, and how our perception of time affects our understanding of reality.

2. Impermanence: Zeitraffer reminds us of the transient nature of existence, emphasizing how everything is subject to change and decay.

3. Perception and Reality: It underscores the difference between how we perceive the world in real-time and how it actually changes over time, raising questions about the reliability of our senses and the nature of reality.
=== Zeitlupenwahrnehmung ===
Zeitlupenwahrnehmung phenomenon translates to “slow motion perception” in English


=== zoophilia ===
((main|Zoophilia))
One of the [[paraphilia]]s, characterized by marked distress over, or acting on, urges to indulge in sexual activity that involves animals.

==References==
((Reflist))

((psychiatry))
((Medicine))
((Glossaries of science and engineering))

[[Category:Psychiatry| ]]
[[Category:Glossaries of medicine|Psychiatry]]
[[Category:Glossaries of science|Psychiatry]]
[[Category:Psychology lists|Psychiatry, glossary]]
[[Category:Wikipedia glossaries using subheadings]]

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