Auditory System

Question 1

what causes impedance in the auditory system?

How is this problem fixed?

Answer 1

• air to fluid

- fixed with oval window, ear drum and lever action of the ossicles

Question 2

what happens to the fluid when the stapes pushes on the oval window?

Answer 2

the round window goes out b/c you can’t compress a fluid

Question 3

when is a sound produced?

Answer 3

when the frequency is matched in the endolymph in the cochlea.

Question 4

where in the cochlea are low frequency sound waves matched and made into sound?

Answer 4

the apical end

Question 5

where in the cochlea are high frequency sound waves matched and made into sound?

Answer 5

the basal end (beginning)

Question 6

what is phase locking?

Answer 6

signals become synchronized and send them out

Question 7

tectoral membrane significance?

Answer 7

hair bundles bang on the tectoral membrane and the potential difference btwn the endolymph and the perilymph depolarizes

Question 8

the auditor nerve goes to what 3 nuclei?

Answer 8

1. dorsal cochlear nucleus
2. postero-ventral cochlear nucleus
3. antero-ventral cochlear nucleus

Question 9

the nuclei related to the auditory nerve then send axons up the ___________ to the brainstem

Answer 9

lateral lemniscus

Question 10

what area does the processing of sound begin?

Answer 10

1. dorsal cochlear nucleus
2. postero-ventral cochlear nucleus (intermediate)
3. antero-ventral cochlear nucleus

Question 11

where you you located sound in space?

Answer 11

1. Lateral superior olive

2. Medial superior olive

Question 12

Where do you form a full spatial map?

Answer 12

inferior colliculus

Question 13

where is sound relayed to cortical areas?

Answer 13

medial geniculate

Question 14

where are complex sounds identified and processes

Answer 14

cortex

Question 15

what nucleus bypasses the superior olive?

Answer 15

dorsal cochlear nucleus

Question 16

the 3 main nuclei of the auditory systems all converge where?

Answer 16

inferior colliculus

Question 17

how is the primary auditory cortex organized !

Answer 17

tonotopically

Question 18

perception of low and high frequency sounds are interpreted?

Answer 18

low frequency = scary

high frequency = nice, how you talk to little kids

Question 19

where is wernicke’s area located?

Answer 19

btwn the pariental and temporal lobe

Question 20

function of wernicke’s area?

Answer 20

integrate speech

Question 21

function of broca’s area

Answer 21

organize speech

Question 22

what is the flow of signal from the auditory cortex to the motor area to initiate speech?

Answer 22

1. primary auditory cortex
2. wernicke’s area
3. Broca’s area
4. Motor area