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((More citations needed|date=July 2018))
((Infobox anatomy
| Name        = Macula of saccule
| Latin       = macula sacculi
| Image       =
| Caption     =
| Image2      =
| Caption2    =
| Precursor   =
| System      =
| Artery      =
| Vein        =
| Nerve       =
| Lymph       =
))

The [[saccule]] is the smaller sized [[Vestibule of the ear|vestibular]] sac (the [[Utricle (ear)|utricle]] being the other larger size vestibular sac); it is globular in form, and lies in the recessus sphæricus near the opening of the [[scala vestibuli]] of the [[cochlea]]. Its anterior part exhibits an oval thickening, the '''macula of saccule''' (or '''saccular macula'''), to which are distributed the saccular filaments of the [[acoustic nerve]].

The vestibule is a region of the inner ear which contains the [[saccule]] and the utricle, each of which contain a macula to detect [[linear acceleration]]. Its function is to detect vertical linear acceleration.  

The macula of saccule lies in a nearly vertical position. It is a 2mm by 3mm patch of hair cells. Each hair cell of the macula contains 40 to 70 [[stereocilia]] and one true [[Cilium|cilia]], called a [[kinocilium]]. A gelatinous cover called the [[otolithic membrane]] envelops the tips of the stereocilia and kinocilium. The otolithic membrane is weighted with small densely packed [[protein]]-[[calcium carbonate]] granules called [[Statoconia|statoconica]].  

The macula of the utricle is in a horizontal position and detects horizontal acceleration.  The coordinated [[sensory perception]] of acceleration both vertically and horizontally along the vestibular nerve, allow for the perception of linear acceleration in any direction.

In vertical linear acceleration, the weighted otolithic membrane lags behind the stereocilia and kinocilium. This bends the stereocilia, which is interpreted by the brain as vertical linear acceleration.<ref>Saladin's 6th edition ''Anatomy and Physiology'' textbook, ((ISBN|978-0077779856))</ref><ref>((cite web|url=http://www.britannica.com/EBchecked/topic/175622/human-ear/65064/Detection-of-linear-acceleration-static-equilibrium?anchor=ref532026|title=human ear - Structure, Function, & Parts|website=Britannica.com|accessdate=10 July 2018))</ref><ref>((Cite web |url=http://www.neurophys.wisc.edu/h%26b/textbook/chap-7.html |title=Chap Vii |access-date=2013-12-13 |archive-url=https://web.archive.org/web/20161209194748/http://www.neurophys.wisc.edu/h%26b/textbook/chap-7.html |archive-date=2016-12-09 |url-status=dead ))</ref><ref>((Cite web |url=http://neuroscience.uth.tmc.edu/s2/chapter10.html |title=Vestibular System: Structure and Function (Section 2, Chapter 10) Neuroscience Online: An Electronic Textbook for the Neurosciences &#124; Department of Neurobiology and Anatomy - the University of Texas Medical School at Houston |access-date=2013-12-13 |archive-url=https://web.archive.org/web/20131203124344/http://neuroscience.uth.tmc.edu/s2/chapter10.html |archive-date=2013-12-03 |url-status=dead ))</ref>

==References==
((Gray's))

((Reflist))

((Auditory and vestibular systems ))
((Portal bar|Anatomy))
((Authority control))

[[Category:Vestibular system]]


((Anatomy-stub))

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