***neuro - auditory & vestibular

Question 1

primary auditory cortex location

Answer 1

transverse temporal gyri

Question 2

important to sound localization

Answer 2

superior olivary nucleus

Question 3

damage to SON or trapezoid body

Answer 3

difficulty localizing sound

Question 4

t/f ? SON receives input from ipsilateral cochlear nucleus

Answer 4

false; receives bilateral cochlear nucleus input

Question 5

receptors in semicircular ducts detect

Answer 5

angular acceleration

Question 6

crista

Answer 6

pocket of hair cells in ampulla

Question 7

ampulla

Answer 7

swelling at end of semicircular duct

Question 8

you will not find kinocilia in

Answer 8

cochlear hair cells

Question 9

cupula deflection leads to

Answer 9

afferent fiber firing

Question 10

saccule - when head is upright macula is

Answer 10

vertical (detects up and down)

Question 11

utricle - when head is upright macula is

Answer 11

horizontal (detects side to side)

Question 12

utricle and saccule detect

Answer 12

linear acceleration of head

Question 13

gelatinous membrane of macula

Answer 13

otolithic membrane

Question 14

gelatinous material of cristae

Answer 14

cupula

Question 15

gelatinous material of organ of corti

Answer 15

tectorial membrane

Question 16

primary afferent cell bodies of vestibular projections

Answer 16

Vestibular Ganglion of internal auditory canal

Question 17

peripheral process of vestibular ganglion

Answer 17

synaptic endings on hair cells

Question 18

central process of vestibular ganglion

Answer 18

vestibular nuclei of rostral medulla, caudal pons

cerebellum

Question 19

4 vestibular nuclei

Answer 19

superior
inferior
medial
lateral

Question 20

functions of vestibular input

Answer 20

posture
coordinate head movement
coordinate eye movement

Question 21

LVST arises from _______ goes down _______

Answer 21

lateral nucleus goes down lateral funiculus

Question 22

LVST provides _______ projections to _________

Answer 22

excitatory

ipsilateral antigravity mm.

Question 23

MVST arises from ________ and extends to ________ via _______

Answer 23

medial nucleus extends to
cervical cord via
MLF

Question 24

stabilizes head movement while walking and coordinates head/eye movement

Answer 24

MVST (baseball players)

Question 25

mediates postural changes

Answer 25

LVST

Question 26

Vestibulo Ocular Reflex system (VOR)

Answer 26

works to prevent images from moving on retina

Question 27

VOR afferent limb

Answer 27

VIII vestibular division

Question 28

VOR efferent limb

Answer 28

III, IV, VI

Question 29

nystagmus

Answer 29

VOR can't compensate for head movements

Question 30

what does alcohol do to vestibular system?

Answer 30

decreases density of cupula to less than endolymph | creates positional nystagmus

Question 31

what 3 systems work together for vision sense

Answer 31

proprioceptive vestibular visual

Question 32

Romberg's sign

Answer 32

close eyes -> sway, loss of balance