Physiology of Hearing and Balance

Question 1

What is the OW ration of the tympanic membrane

Answer 1

18:1

Question 2

what muscles open the eustacian tube

Answer 2

TENSOR VELI PALATINI

palatine muscles

Question 3

what is the function of the Eustachian tube

Answer 3

equalise the ears

Question 4

Describe the ultrastructure of the inner ear

Answer 4

Scala media (endolymph) suspended between the scala tympani and scala vestibule (perilymph)

Question 5

Where is the organ of corti situated

Answer 5

the basilar membrane

Question 6

What is the function of hair cells

Answer 6

conversion of mechanical bending force into an electrical impulse

Question 7

When does depolarisation occur

Answer 7

when steriocilia are deflected towards the longest hars

Question 8

what connects with the oval window

Answer 8

the stapes to the scala vestibuli

Question 9

where is the primary auditory cortex

Answer 9

the superior temporal gyrus

brodman areas 41 and 42

Question 10

name the structures of the vestibular portion of the membranous labyrynth

Answer 10

sacule
utricle
posterior, lateral and superior semi circular canals

Question 11

what as an nystagmus

Answer 11

involuntary eye movement due to stimulation of the hair cells in the semi circular canals when the head is not moving