Anatomy of vestibular system Flashcards
function of the cochlea
interprets sound
where does the auditory nerve come from
cochlea
what is the endolymphatic duct
stores endolymph that goes into the SC canals
what are the 3 SC canals
anterior, posterior, and horizontal
(detect head mvmts in all 3 anatomical planes)
what do SC canals measure
angular acceleration
rotation
where are otolith organs
utricle and saccule
- within connective tissue (act as weights)
what do the utricle and saccule measure
tilt and linear acceleration
how many SC canals and otolith organs do we have
10 total
6 SC canals and 4 otolith organs
(3 and 2 on each side)
what is the ampulla
compartment in the SC canals
contains hair cell receptors
what is the kinocillium
largest stereocilia
what is the cupula
gelatinous structure in the ampulla
where hair cells are embedded
what is otoconia
tiny chalk crystals embedded in the gelatinous otolithic membrane
- made of calcium bicarbonate
where do the hair cells point in a saccule
hair cells point away away from the midline (striola)
where do the hair cells point in the utricle
towards the midline (striola)
what is the midline called
striola
