Paracentral lobule
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Medial surface of left cerebral hemisphere. (Paracentral lobule is shown in red.)
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Medial view of a halved human brain (Paracentral lobule labeled at top center, in blue.)
Details
Identifiers
Latinlobulus paracentralis
NeuroNames1341
TA98A14.1.09.209
TA25466
FMA77534
Anatomical terms of neuroanatomy

Paracentral lobule is on the medial surface of the hemisphere and is the continuation of the precentral and postcentral gyri. The paracentral lobule controls motor and sensory innervations of the contralateral lower extremity. It is also responsible for control of defecation and urination.

It includes portions of the frontal and parietal lobes:[1]

While the boundary between the lobes, the central sulcus, is easy to locate on the lateral surface of the cerebral hemispheres, this boundary is often discerned in a cytoarchetectonic manner in cases where the central sulcus is not visible on the medial surface.

Function

Neurons in paracentral lobule are concerned with:

  1. Motor and sensory innervations of the contralateral lower extremity
  2. Regulation of physiological function such as defecation and micturition

Blood supply

It is supplied by branches of the anterior cerebral artery.

Applied anatomy

Damage of paracentral lobule occurs from occlusion of anterior cerebral artery. Characteristic manifestations include:

Gallery

References

  1. ^ Neuroscience in medicine. Totowa, NJ: Humana Press. 2003. p. 348. ISBN 1-58829-016-6.