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Neuro > Cranial Nerves (VII-XII) > Flashcards

Cranial Nerves (VII-XII) Flashcards

1
Q

Functions of Facial Nerve

A

Motor SVE - muscles of face (facial
expression) and scalp, stapedius muscle, posterior belly of digastric, stylohyoid muscles

Sensory SVA - taste from anterior 2/3 of tongue from floor of mouth and palate

Sensory GSA - sensation from a small region near the external auditory meatus

Parasympathetic GVE - secretomotor to submandibular and sublingual glands, lacrimal glands and glands of nose and
palate

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2
Q

Carries brachial motor fibers for facial expression

A

Main Trunk

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3
Q

In facial nerve, Carries fibers for PSY (tearing and salivation), taste, and GSA

A

Nervus Intermedius

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4
Q

3 nuclei of facial nerve

A
  1. Main Motor Nucleus
  2. Parasympathetic Nuclei
    ● Superior salivatory nucleus
    ● Lacrimal nucleus
  3. Sensory Nucleus
    ● Nucleus tractus solitarius
    ● Trigeminal nucleus
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5
Q

Facial nucleus

Lies deep in the reticular formation of the
lower part of the pons

Part of the nucleus supplies muscles of the
upper part of the face receives fibers from
both cerebral hemispheres

A

Main Motor Nucleus

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6
Q

Motor cortex supplying lower part of face

A

contralateral side of motor
cortex

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7
Q

Motor cortex supplying upper part of face

A

both sides of motor cortex

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8
Q

facial nuclei that Lie posterolateral to the main motor nucleus

A

parasympathetic nuclei

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9
Q

Parasympathetic nucleus of facial nerve that receives afferent fibers from thalamus through descending autonomic pathways

A

Superior Salivatory Nucleus

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10
Q

PSY facial nuclei that Receives afferent fibers from hypothalamus
for emotional responses and from sensory
nuclei of trigeminal nerve for reflex
lacrimation due to irritation

A

Lacrimal Nucleus

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11
Q

has Afferent fibers: geniculate ganglion of CN VII

Efferent fibers cross midline and ascend to VPM of opposite thalamus

A

Nucleus of Tractus Solitarius

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12
Q

Upper part (rostral) of nucleus of tractus solitarius

A

sensory nuclei

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13
Q

● formed of Central processes of unipolar cells of
geniculat ganglion
● Also contain efferent preganglionic PSY
fibers from parasympathetic nuclei

A

Sensory Root (nervus intermedius)

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14
Q

lies in the genu and
contains primary sensory neurons for taste in anterior ⅔ of tongue, GSA for a region
near external auditory meatus

A

Geniculate ganglion

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15
Q

Main portion of facial nerve exits the skull through

A

stylomastoid foramen

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16
Q

facial nerve Pass through the parotid gland and divides
to 5 major brachial motor branches that control facial expression

A

○ Temporal
○ Zygomatic
○ Buccal
○ Mandibular
○ Cervical
○ Other smaller motor branches
innervate the stapedius, occipitalis,
posterior belly of digastric, and
stylohyoid muscles

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17
Q

Dampen movements of middle ear
ossiclesproviding feedback
modulation of acoustic signal
intensity

A

stapedius

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18
Q

tensor tympani innervated by

A

trigeminal

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19
Q

carried by greater
petrosal nerve (takes off the main trunk of CN VII) to reach sphenopalatine
(pterygopalatine) ganglion where
postganglionic PSY project to lacrimal
glands and nasal mucosa

A

Preganglionic PSY fibers from Superior
Salivatory Nucleus

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20
Q

leaves CN VII just before
the stylomastoid foramen and travels back
upward to traverse the middle ear cavity
before exiting the skull at the petrotympanic
fissure, just medial to the TMJ.

A

Chorda tympani

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21
Q

Chorda tympani carry

A

SVA taste for anterior
⅔ of tongue

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22
Q

taste from
posterior ⅓ tongue and
pharynx

A

CN IX and X

23
Q

Chorda tympani Synapse with rostral

A

nucleus
solitarius (gustatory nucleus)

24
Q

Ascending projections of chorda tympani travel via
____ to VPM then
to cortical gustatory area

A

central tegmental tract

25
Q

inferior margin of the
postcentral gyrus adjacent to tongue
somatosensory area and extends
into the fronto-parietal operculum
and insula

A

BA 43

26
Q

submandibular and sublingual glands,
nasal, and palatine glands

A

Superior salivatory nucleus

27
Q

UMN LESION VS LMN LESION

A

UMN lesion - contralateral side EXCEPT FOREHEAD
LMN lesion - affects whole face

28
Q

2 components and function of vestibulocochlear nerve (CN VIII)

A

Vestibular: SSA
- from utricle and
saccule and semicircular
canals - position and
movement of head

Cochlear: SSA
- organ of Corti -
hearing

29
Q

respo for head position and head movement

A

● Utricle and saccule - head position
● Semicircular canals - head movement

30
Q

Vestibular Nucler Complex
● 4 Nuclei
- Beneath floor of 4th ventricle

A
  1. Lateral vestibular nucleus
  2. Superior vestibular nucleus
  3. Medial vestibular nucleus
  4. Inferior vestibular nucleus
31
Q

The nerve fibers of the vestibular nerve are the central
processes of nerve cells located in the

A

ganglion, situated in internal acoustic meatus

32
Q

The vestibular nuclei receive afferent fibers from
the utricle and saccule and the semicircular canals
through the vestibular nerve and fibers from the cerebellum
through

A

inferior cerebellar peduncle

33
Q

Efferent fibers from the nuclei pass to the cerebellum through the

A

inferior cerebellar peduncle.

34
Q

The cochlear nerve conducts nerve impulses concerned
with sound from the

A

organ of corti in the cohclea

35
Q

The
fibers of the cochlear nerve are the central processes of
nerve cells located in the

A

spiral ganglion of cochlea

36
Q

On entering the pons, the nerve fibers of cochlear nerve
divide, with two branches entering the

A

posterior and anterior cochlear nucleus, respectively

37
Q

Send axons that run medially through pons
to end in

A

trapezoid body and the
olivary nucleus

38
Q

cochlear nuclei ascend through post parts of of pons and midbrain as

A

lateral lemniscus

39
Q

As these cochlear fibers ascend, some
of them relay in small groups of nerve cells, collectively
known as the

A

nucleus of the lateral lemniscus

40
Q

he primary auditory cortex (areas 41 and 42) includes
what gyrus

A

gyrus of Heschl on the upper surface of the superior
temporal gyrus

41
Q

gyrus of Heschl in what cortex

A

primary auditory cortex

42
Q
A
43
Q

The recognition and interpretation
of sounds, on the basis of past experience, take place in
the

A

secondary auditory area

44
Q

components and functions of glossopharyngeal nerve (CN IX)

A

● SVE- stylopharyngeus muscle- swallowing
● GVE- secretomotor PSY to parotid gland
● SVA- taste from posterior ⅓ of tongue and
pharynx
● GVA- carotid sinus (baroreceptor) and
carotid body (chemoreceptor)
● GSA- general sensation to middle ear, region near external auditory meatus, pharynx, and posterior ⅓ of tongue

45
Q

Parasympathetic nucleus of CN IX

A

inferior salivary nucleus

45
Q

component, muscle, and nucleus responsible of elevating the pharynx when talking or
swallowing and contributes to gag
reflex

A

SVE - brachial motor portion

stylopharyngeus

nucleus ambiguus

46
Q

PSY vagal leave via _____ and
then joins the lesser petrosal nerve
to synapse in the optic ganglion to
the parotid gland

A

tympanic nerve

47
Q

three nucleus of glossophargyngeal nerve

A

(1) the
main motor nucleus,
(2) the parasympathetic nucleus - inferior salivatory nucleus

(3) the sensory nucleus - nucleus solitarius

48
Q

GVA and SVA in CN IX

A

inferior (petrosal)
glossopharyngeal ganglion

49
Q

GSA in IX

A

to inferior and superior (jugular)
glossopharyngeal ganglion

50
Q

main motor nucleus of CN IX Lies deep in reticular formation of medulla
and is formed by

A

sup end of nucleus ambiguus

51
Q

supplies stylopharyngeus muscle

A

main motor nucleus

52
Q

reflex involving the
glossopharyngeal and vagus nerves helps
assist regulation of blood pressure

A

carotid sinus reflex

53
Q
A

Neuro (16 decks)

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