The saccule is the smaller sized vestibular sac (the 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 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 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.[1][2][3][4]
Referencesedit
This article incorporates text in the public domain from page 1052 of the 20th edition ofGray's Anatomy(1918)
macula, saccule, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, july, 2018. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Macula of saccule news newspapers books scholar JSTOR July 2018 Learn how and when to remove this message The saccule is the smaller sized vestibular sac the utricle being the other larger size vestibular sac it is globular in form and lies in the recessus sphaericus 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 Macula of sacculeDetailsIdentifiersLatinmacula sacculiTA98A15 3 03 084TA27002FMA74944Anatomical terminology edit on Wikidata 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 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 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 1 2 3 4 References edit nbsp This article incorporates text in the public domain from page 1052 of the 20th edition of Gray s Anatomy 1918 Saladin s 6th edition Anatomy and Physiology textbook ISBN 978 0077779856 human ear Structure Function amp Parts Britannica com Retrieved 10 July 2018 Chap Vii Archived from the original on 2016 12 09 Retrieved 2013 12 13 Vestibular System Structure and Function Section 2 Chapter 10 Neuroscience Online An Electronic Textbook for the Neurosciences Department of Neurobiology and Anatomy the University of Texas Medical School at Houston Archived from the original on 2013 12 03 Retrieved 2013 12 13 Portal nbsp Anatomy nbsp This anatomy article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Macula of saccule amp oldid 1105851798, wikipedia, wiki, book, books, library,
