Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Neuro final > auditory tracts > Flashcards

auditory tracts Flashcards

1
Q

what is the primary afferent of the auditory pathway

A

cochlear part of CN VIII

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

where are the cell bodies of the cochlear part of CN VIII

A

spiral ganglion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

where does the primary afferent of the auditory pathway enter the brainstem

A

pontomedullary junction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

where does the ascending bundle of the cochlear part of CN VIII synapse

A

anterior subdivision of ventral cochlear nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

where does the descending bundle of the cochlear part of CN VIII synapse

A
  • dorsal cochlear nucleus OR

- posterior subdivion of ventral cochlear nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is the function of the dorsal cochlear nucleus

A

identifying source of a sound and complex characteristics of sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is the function of the ventral cochlear nucleus

A

horizontal localization of sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is the route of monaural information from the dorsal cochlear nucleus

A

dorsal cochlear nucleus => dorsal acoustic stria => contralateral lateral leminiscus => *inferior colliculus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is the route of monaural information from the inferior colliculus

A

brachium of inferior colliculus => synpase in MGN => Primary auditory cortex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

where does monaural information from the MGN synapse

A

layer IV of the primary auditory cortex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is binaural information

A

information about differences between sounds in both ears

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the route of binaural information from the ventral cochlear nuclei

A

projects bilaterally through trapezoid body to superior olivary complex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the route of binaural information from the superior olivary complex

A

medial and lateral olivary nuclei => lateral lemniscus => *inferior colliculus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is the overall route of monaural information

A

dorsal cochlear nucleus => dorsal acoustic stria => contralateral lateral lemniscus => *inferior colliculus => *MGN => *layer IV of primary auditory cortex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is the route of binaural information from the inferior colliculus to the primary auditory cortex

A

*inferior colliculus => *MGN => * layer IV of primary auditory cortex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is the overall route of binaural information

A

ventral cochlear nucleus => bilateral superior olivary nuclei => lateral lemniscus => *inf colliculus => *MGN => * layer IV of primary auditory cortex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what is the cause of sensorineural hearing loss

A

damage to CN VIII (cochlear part), cochlea or cochlear nuclei

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what is the cause of conductive hearing loss

A

obstructed pathway of sound to tympanic membrane or through ossicles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what is the blood supply to the cochlea and auditory nuclei of the pons and medulla

A

basilar artery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what supplies the cochlear nuclei and inner ear

A

labryrinthine a. (branch of AICA)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what deficits will be seen in occlusion of aica

A

monaural hearing loss

possibly also ipsilateral facial paralysis and inability to look towards side of lesion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what supplies the superior olivary complex and lateral lemniscus

A

short circumferential branches of basilar a

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

what supplies the inferior colliculus

A

superior cerebellar a AND

quadrigeminal as

24
Q

what supplies the primary auditory and association cortices

A

M2 segment of MCA

25
Q

what supplies the medial geniculate body

A

thalamogeniculate arteries

26
Q

what is the function of wernicke’s area in the dominant hemisphere

A

comprehension of spoken language

27
Q

what is the function of wernicke’s area in the non-dominant hemisphere

A

interpretation of nonverbal signals

28
Q

what is the function of broca’s area in the dominant hemisphere

A

grammar, language and speech production

29
Q

what is the function of broca’s area in the non-dominant hemisphere

A

instruction for producing non-verbal communication (tone, gestures)

30
Q

what is auditory agnosia

A

inability to describe a sound that has been heard

31
Q

what lesion causes auditory agnosia

A

bilateral temporal lesion

32
Q

fluent aphasia results from damage to what area

A

wernickes

33
Q

what sxs are associated w/ lesion to wernicke’s area

A

fluent aphasia
inability to read/write (alexia/agraphia)
unable to understand others

34
Q

can pt’s with a broca’s area lesion understand spoken or written commends

A

YES

35
Q

how does a broca’s area lesion present

A

mutism if severe

non-fluent aphasia (slow, labored speech)

36
Q

a lesion to what structure causes global aphasia

A

lateral sulcus

37
Q

a lesion to what structure causes conduction aphasia

A

arcuate fasciculus

38
Q

what are the sxs of conduction aphasia

A

pt can’t repeat but can comprehend
reading intact, writing impaired
speech is fluent, interrupted by word-finding difficult

39
Q

what features are common between the binaural and monaural tracts

A
  • synapse in cochlear nuclei, inferior colliculus, MGN, primary auditory cortex
  • fibers cross multiple times in brainstem
40
Q

the ability to repeat differentiates wernicke’s aphasia from what?

A

transcortical SENSORY aphasia

41
Q

the ability to repeat differentiates broca’s from what?

A

transcortical MOTOR aphasia

42
Q

what is receptive aphasia

A

fluent aphasia

43
Q

what is expressive aphasia

A

non-fluent

44
Q

infarction of the MCA-PCA border zone results in what condition

A

transcortical sensory aphasia

45
Q

infarction of ACA-MCA border zone results in what condition

A

transcortical motor aphasia

46
Q

occlusion of what artery causes global aphasia

A

MCA

47
Q

what structure is responsible for word repetition

A

arcuate fasciculus

48
Q

what tract does broca’s area relay information to to product speech

A

corticobulbar

49
Q

what structure is responsible for word recognition

A

lateral temporal cortex

50
Q

where are arcuate fibers

A

within the temporal lobe, extending from wernicke’s to broca’s area

51
Q

what area is responsible for reading

A

wernickes

52
Q

what area is responsible for understanding sarcasm

A

area analogous to wernicke’s

53
Q

what area is responsible for producing inflection

A

area analogous to broca’s

54
Q

from what artery do the quadrigeminal arteries branch

A

PCA

55
Q

what causes central deafness

A

damage to monaural or binaural pathway

56
Q

what are the sxs of central deafness

A

can hear but can’t localize sound

57
Q

why don’t lesions of the monaural or binaural pathways cause deafness

A

because the fibers cross multiple times in the brainstem

Neuro final (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions