Covering the crista ampullaris is a gelatinous mass called the cupula.
2.
Inside are hair cells and supporting cells known as the crista ampullaris.
3.
The semicircular ducts are filled with endolymph, and contain the crista ampullaris.
4.
The crista ampullaris itself is a cone-shaped structure, covered in receptor cells called " hair cells ".
5.
Part of the crista ampullaris, the cupula has embedded within it hair cells that have several stereocilia associated with each kinocilium.
6.
The cupula itself is the gelatinous component of the crista ampullaris that extends from the crista to the roof of the ampullae.
7.
As the endolymph pushes the cupula, the stereocilia is bent as well, stimulating the hair cells within the crista ampullaris.
8.
Upon angular acceleration ( rotation ), the endolymph within the semicircular duct deflects the cupula against the hair cells of the crista ampullaris.
9.
Stimulation of the semicircular canals occurs when movement of the endolymph inside the canals causes movement of the crista ampullaris and the hair cells within them.
10.
This includes ~ 7, 000 hair cells from each of the semicircular canals located within the crista ampullaris, ~ 30, 000 hair cells from the utricle, and ~ 16, 000 hair cells from the saccule.
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