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Flashcards in The Inner Ear Deck (11)
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1
Q

what are the 2 labyrinths of the inner ear

A

the bony and the membranous labyrinths

2
Q

where are the bony and membranous labyrinths found

A
bony = in the otic capsule
membranous = suspended within the bony labyrinth
3
Q

what are the bony and membranous labyrinths filled with

A
bony = perilymph 
membranous = endolymph
4
Q

where are hair cells located and what is their role in hearing

A

located in organ of corti

pressure waves in perilymph move the hair cells, APs stimulated and conveyed to brain by cochlear nerve

5
Q

where is the organ of corti found

A

located on basilar membrane of the cochlear duct

6
Q

describe what the cochlear duct is suspended by and how it divides the cochlear canal

A

cochlear duct suspended by spiral ligament

divides cochlear canal into 2 parts; the scala tympani and scala vestibuli

7
Q

what is responsible for balance and movement perception in the head

A

the vestibular appartus

8
Q

what are the roles of the semi-circular ducts, the urticle and the saccule in movement perception

A

semi-circular ducts = detect angular movement change

urticle and saccule = detect linear movement change

9
Q

what are the 3 semi-circular canals of the inner ear

A

superior(anterior)
posterior
lateral

10
Q

what cranial nerve innervates the inner ear, and what does it split into

A

CN VIII, the vestibulocochlear nerve

splits into vestibular and cochlear nerves

11
Q

what travels through the internal acoustic meatus

A

CN VIII, CN VII(facial nerve), labyrinthine artery(and veins)