Auditory System Flashcards Preview

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Flashcards in Auditory System Deck (22)
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1
Q

what causes impedance in the auditory system?

How is this problem fixed?

A
  • air to fluid

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

2
Q

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

A

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

3
Q

when is a sound produced?

A

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

4
Q

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

A

the apical end

5
Q

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

A

the basal end (beginning)

6
Q

what is phase locking?

A

signals become synchronized and send them out

7
Q

tectoral membrane significance?

A

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

8
Q

the auditor nerve goes to what 3 nuclei?

A
  1. dorsal cochlear nucleus
  2. postero-ventral cochlear nucleus
  3. antero-ventral cochlear nucleus
9
Q

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

A

lateral lemniscus

10
Q

what area does the processing of sound begin?

A
  1. dorsal cochlear nucleus
  2. postero-ventral cochlear nucleus (intermediate)
  3. antero-ventral cochlear nucleus
11
Q

where you you located sound in space?

A
  1. Lateral superior olive

2. Medial superior olive

12
Q

Where do you form a full spatial map?

A

inferior colliculus

13
Q

where is sound relayed to cortical areas?

A

medial geniculate

14
Q

where are complex sounds identified and processes

A

cortex

15
Q

what nucleus bypasses the superior olive?

A

dorsal cochlear nucleus

16
Q

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

A

inferior colliculus

17
Q

how is the primary auditory cortex organized !

A

tonotopically

18
Q

perception of low and high frequency sounds are interpreted?

A

low frequency = scary

high frequency = nice, how you talk to little kids

19
Q

where is wernicke’s area located?

A

btwn the pariental and temporal lobe

20
Q

function of wernicke’s area?

A

integrate speech

21
Q

function of broca’s area

A

organize speech

22
Q

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

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