Auditory pathways

Question 1

Sound waves transmitted by

Answer 1

tympanic membrane

Question 2

sound waves are amplified by ____ to reach the ____

Answer 2

middle ear ossicles (malleus, incus, and stapes)

oval window

Question 3

movement of malleus are dampened by

Answer 3

tensor tympani

Question 4

movement of stapes dampened by

Answer 4

stapedius muscle

Question 5

contains perilymph

Answer 5

bony labyrinth

Question 6

contains structures of membranous labyrinth

Answer 6

bony labyrinth

Question 7

contains endolymph

Answer 7

membranous labyrinth

Question 8

contains hair cells (organ of Corti)

Answer 8

cochlear duct

Question 9

are activated by movement of the basilar membrane relative to the stiff tectorial membrane

Answer 9

organ of corti (hair cells)

Question 10

located along the central rim of the cochlea, send axons into the cochlear nerve

Answer 10

spiral ganglion

Question 11

axons ascend through brainstem bilat with series of relays to the

Answer 11

inferior colliculi through lateral lemniscus, MSG, and primary auditory cortex

Question 12

Unilateral hearing loss is not due to lesions in CNS proximal to cochlear nuclei because

Answer 12

auditory infos cross bilat at multiple pts in the brains tem

Question 13

localize sounds horizontally in space

Answer 13

superior olivary nuclear complex of pons

Question 14

trapezoid body

Answer 14

crossing auditory fibers

Question 15

MGB via auditory radiations to primary auditory cortex in transverse

Answer 15

gyrus of Heschl

Question 16

auditory info ascending through brain stem and thalamus to auditory cortex come from

Answer 16

contra ear

Question 17

two types of hearing loss

Answer 17

Conductive and sensorineural hearing loss

Question 18

Conductive hearing loss cause

Answer 18

due to peripheral lesion in external auditory canal and middle ear

outer ear: impacted cerume
inner ear: otitis media, osteosclerosis, TM perforation

Question 19

Sensorineural hearing loss cause

Answer 19

due to cochlea or auditory component of CNVIII

Question 20

Hearing loss is examine via

Answer 20

otoscope