Final Neuro - Auditory and Vestibular Systems Flashcards Preview

► Med Misc 04 > Final Neuro - Auditory and Vestibular Systems > Flashcards

Flashcards in Final Neuro - Auditory and Vestibular Systems Deck (54):
1

**Where are the unipolar cell bodies or origin located that direct tooth pain

trigeminal Gasserian semilunar ganglion

2

What are the three anatomical regions of the ear

external
middle
inner

3

This region of the ear directs sound into the ear canal

outer ear

4

This region of the ear contains the ossicles and window and transmits sound from the tympanic membrane to the cochlea

middle ear

5

This region of the ear contains the osseous and membraneous labyrinth

inner ear

6

When sound reaches the tympanic membrane where does it go next

along the bones of the middle ear to the oval window though the membranous labyrinth

7

Which cavity contains the auditory neuroepithelium

membraneous labyrinth

8

This is the hollowed-out region of the temporal bone filled with perilymph

osseous labyrinth

9

This encloses the sensory organs of balance and hearing and consists of a series of endolymph ducts and chambers

membranous labyrinth

10

What does the membranous labyrinth contain

neuroepithelium of the ear
cochlear duct and organ of Corti
vestibular labyrinth.

11

What does the cochlear division of the inner ear consist of

scala media (cochlear duct)

12

The membraneous labyrinth is separated from other channels by what

vestibular membrane above
basilar membrane below

13

This is the perilymphatic space about the cochlear duct

scala vestibuli

14

This is the space enclosed by the cochlear duct filled with endolymph and contains the neuroepithelium and basilar membrane

scala media

15

This is the space below the cochlear duct

scala tympani

16

What is found within the cochlear duct

scala media containing endolymph
Organ of Corti

17

The cochlear duct is part of which portion of the membranous labyrinth

auditory

18

This translates vibration and sound into neuron signals

Organ of Corti

19

This peripheral process of the statoacoustic nerve (CN VII) is in contact with the hair cells of the organ of Corti

tectorial membrane; located above the hair cells

20

What are the two auditory streams

"What"
"Where"

21

What does the "what" auditory portion consist of

language processing
dorsal cochlear nucleus

22

What does the "where" auditory portion consist of and relates to

*ventral cochlear nucleus
accessory auditory nuclei; superior olivary nucleus and nucleus of the lateral lemniscus

23

This is involved with sound location via time delay and intensity difference, terminates in the outer hair cells of chochlea and plays a role with postnatal development

superior olivary complex

24

This receives fibers from the cochlear nuclei and superior olivary nucleus to the inferior colliculus

lateral lemniscus

25

This carries signals to the medial geniculate body

inferior colliculus

26

This projects fibers to the primary auditory cortex located in the transverse temporal gyri of Heschl

medial geniculate body

27

This is the main area of "what" language processing; the signals go in a ventral direction

superior temporal gyrus

28

This is involved with planning a motor response to an incoming stimulus

superior parietal lobe

29

What are the three balance related structures of the inner ear

utricle
saccule
semicircular canals

30

Where in the inner ear is the vestibular labyrinth located

in the membraneous labyrinth filled with endolymph

31

What are the two different subdivisions of the vestibular labyrinth

static labyrinth
dynamic labryinth

32

This is located in the static labyrinth and serves as a "plumb bob-like" (gravity) reference for the head

otolith organ

33

What does the otolith organ consist of

utriculus
sacculus

34

These are hard crystals above the gelatinous substance that tumble during movement and stimulate the hair cells

otolith

35

What are the components of the hair cells

kinocilium; longest one
stereocilia; short ones

36

What two vestibular sensations is the static labyrinth sensitive to

vibrations
linear acceleration

37

This is is located in the dynamic labyrinth and senses turning movements of the head

semicircular canals

38

What are the canals of the semicircular canals

horizontal
vertical
ampulla at base

39

What does the dynamic labyrinth enable us to do

maintain our gaze on a particular object while the head is moving

40

What specific sensations are the semicircular canals sensitive to

vibrations (rapid back and forth movement)
angular acceleration

41

What is the primary function of the dynamic labyrinth

provide reflex control of eye movements

42

What is the macula

this is where the otoliths are embedded

43

What stimulus are the otolith and macula sensitive to

head tilts; linear acceleration
directionally sensitive

44

This is the neuroepithelium of the semi circular canal and is in the ampulla

crista ampullaris

45

This is a gelatinous projection in which the kinocilia project; it floats in the endolympth

cupula

46

What stimulus are the cristae sensitive to

angular acceleration; yes or no movements

47

What is the cranial nerve that serves the vestibular portion of the inner ear

vestibulocochlear nerve (CN VIII)

48

Where does CN VIII terminate

the pontocerebellar junction

49

What is the brain strictures in which primary afferents of the semicircular canal and otolith organ terminate

vestibular nuclei
cerebellum

50

In which brain structure do eye movement controlling fibers terminate

flocculonodular lobe

51

What is the myelinated pathway that link the vestibular nuclei with the eye movement control nuclei

medial longitudinal fasciculus (MLF)

52

This demonstrates the integrity of the vestibule-ocular reflex and the medial longitudinal fascicles (MLF)

doll's eye maneuver

53

What happens to the eyes when affected with dolls eye maneuver

if the head is turned passively to one side, the eyes will respond by turning to the opposite side

54

Where is the location of the primary vestibular cortex

posterior insular cortex