MODULE 7- ARPIN STUDY GUIDE Flashcards
movement of stereocilia toward kinocilium depolarizes/hyperpolarizes the hair cell
depolarizes
movement of stereocilia away from the kinocilium depolarizes/hyperpolarizes the hair cell
hyperpolarizes
what occurs from some tonic release of neurotransmitter in the absence of stimulation
baseline firing rate in vestibular nerve
otolith organs
-utricle
-saccule
what are otolith organs sensitive to
-linear accelerations
-head tilt
where are hair cells located
the macular
how is utricle macular oriented
horizontally
how is saccule macular oriented
vertically
striola
divides hair cells with opposite polarity
what displaces the hair bundles, causing depolarization + hyperpolarization
shearing motion between the otolithic membrane + the macular
what causes shearing motion
linear acceleration
-during increasing/decreasing velocity
-not constant velocity
what also causes shearing motion
head tilt
what are semicircular canals sensitive to
rotational/angular acceleration
-NOT linear/translational movements of the head
where is hair cell located
ampulla
hair bundles extend out into where
cupula