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Neuro Exam 3 > Cranial Nerves IX-XII > Flashcards

Cranial Nerves IX-XII Flashcards

1
Q

location of CN IX-XII

A

in the most rostral part of the medulla and extend down into the spinal cord

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2
Q

Match these.. (options are CN IX-XII)
comes out more ant. on the medulla
have nuclei extending down into the spinal cord
come out more laterally and near post border

A

CN 12-more ant
CN XI-extends down into spinal cord
CN IX, X, XI- come out more laterally and near post. border

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3
Q

CN IX nerve type classification

A

branchiomeric thus special efferent –> supplies m.

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4
Q

Two plates of the developing neural tube

A

Basal plate (more ventral) and alar plate (more dorsal)

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5
Q

Basal plate

A

ventral plate of the developing neural tube which forms motor neurons; they migrate to ventral horns or more medially in the brainstem

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6
Q

Alar plate

A

Dorsal plate of the developing neural tube which forms the sensory neurons; they migrate to dorsal horns of spinal cord; or more lateral in the brainstem

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7
Q

Motor, sensory, or both for CN 1-12?

A 
Some
Say
Marry
Money
But
My 
Brother
Says 
Big
Brains
Matter
More
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8
Q

CN IX; motor, sensory? Functional components?

A

Both/mixed and 5

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9
Q

Number of nuclei that send and recieve to CN IX, and where they are

A

4 nuclei, in the medulla

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10
Q

inf. salvatory nucleus and nucleus ambiguous

A

Motor nuclei (thus more medial) of CN IX; inf salvatory is GVE that send parasympathetic and Nucleus ambiguous houses cell bodies of SVE that carry signal to skeletal m. and derived from brachial arches

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11
Q

GVE nuclei of CN IX

A

inf salvatory nuclei-sends parasympathetics

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12
Q

SVE nuclei of CN IX

A

nucleus ambiguous-sends signal to skeletal m. and is derived from brachial arches

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13
Q

Sensory nuclei of CN IX

A

nucleus of solitary tract (SVA and GVA) and sensory nucleus of CN V holds GSA for CN V

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14
Q

Nucleus of solitary tract

A

One of the 2 sensory nuclei of CN IX, does SVA and SVA

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15
Q

Sensory nucleus of CN V as it pertains to CN IX

A

Does sensory GSA for CN IX

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16
Q

Motor and sensory nuclei of CN IX that also house cell bodies for fibers of the vagus nerve (CN X)

A

Nucleus ambiguous, nucleus of solitary tract, and sensory nucleus of CNV

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17
Q

CN IX emerges from where and leaves the cranium via what

A

from the posterolateral nucleus of the rostral medulla through the jugular foramen

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18
Q

What all passes through the jugular foramen

A

CN IX, X, XI, and int. jugular vein

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19
Q

after passing through jugular foramen, what of CN IX appears

A

the inf and sup ganglia which contain the psuedounipolar cell bodies for afferent components of this nerve

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20
Q

inf and sup ganglia of CN IX appear where and have what?

A

appear once the nerve passes through the jugular foramen and have psuedounipolar cell bodies for afferents of this nerve

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21
Q

pseudounipolar cell bodies of CN IX housed in the superior do _____ while those in the inferior do _______

A

sup —> GSA (S and S)-General somatosensory

Inf –> GVA and SVA

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22
Q

innervates stylopharyngeal muscle

A

CN IX; only muscle it does, done so by Nucleus ambiguous b/c this muscle is brachiomeric so SVE

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23
Q

after innervating stylopharyngeal muscle, CN IX does/goes where

A

spreads into the pharynx and goes down between the sup and middle pharyngeal constrictor muscles to the tongue and the oropharynx

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24
Q

GVE fibers of CN IX house cell bodies where?

A

in the inf. salvitory nucleus

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25
Q

pre-synaptic parasympathetic fibers of inf. salvitory nucleus (GVE) from CN IX go down to where

A

hop on the tympanic nerve which goes to the tympanic plexus in the middle of the ear

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26
Q

GVE of CN IX ultimately will do what

A

target the parotid gland to increase salivation

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27
Q

GVE pathway of CN IX

A

GVE in salivatory nucleus –> pre-synaptic n. hop on the tympanic n. –> tympanic n. plexus in middle ear –> GVE leaves on lesser petrosal n. –> otic ganglion which has post-synaptic parasympathetic fibers –> hop on auriculotemporal n. (of V3) to the parotid gland to increase salivation

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28
Q

Mediates the afferent limb of the gag reflex

A

GSA from CN IX

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29
Q

GSA from CN IX

A

mediates the afferent limb of the gag reflex

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30
Q

GSA-general somatic afferents of CN IX are

A

pharyngeal, tonsilar, and lingual branches of CN IX

tympanic n. too

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31
Q

GSA-General Somatic Afferents of CN IX sense what

A

general sensations such as pain, touch,

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32
Q

GSA of CN IX houses cell bodies in what nuclei

A

house GSA nuclei in sensory nuclei of CN V but then run through the superior ganglion of CN IX

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33
Q

GSAs of CN IX and where they receive from

A

pharyngeal, tonsilar, lingual of CN IX and the tympanic n.

sensory from
upper pharynx, tonsils, post 1/3 tongue, internal lining of tympanic membrane of ext ear

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34
Q

Caries GVA info from carotid sinus (thinking CN IX)

A

Carotid sinus n. aka Hering’s n.

35
Q

Hering’s n.

A

Caries GVA from carotid sinus; aka carotid sinus n.

36
Q

senses changes in BP

A

a barorecpetor right near the bifurcation of the common carotid-near the carotid sinus

37
Q

sense changes in blood gases

A

chemoreceptors at the bifurcation of the common carotid a.

38
Q

chemoreceptors at the bifurcation of the common carotid

A

sense changes in blood gases

39
Q

baroreceptor near carotid sinus/bifurcation of common carotid

A

sense changes in BP

40
Q

Peripheral process of GVA Fibers have an axon that ascends to cell bodies in the ______ and central processes will ascend to nucleus of _______

A

inf. ganglion

solitary tract

41
Q

SVA fibers of CN IX

A

Taste; cell bodies in inf. ganglion and central processes ascend to nucleus of solitary tract

42
Q

Fibers of CN IX for taste

A

SVA

43
Q

CN X fiber type, functional components, and nuclei number and where

A

Both/mixed, 5, and 4 nuclei in the medulla 3 of which are the same as CN IX

44
Q

Nuclei in the medulla that send and receive with CN X

A 
Motor
-Dorsal Vagal Nucleus (GVE)
-Nucleus Ambiguous (SVE)
Sensory
-nucleus of solitary tract (GVA and SVA)
-sensory nucleus of CN V (GSA)
45
Q

ganglion responsible for general sensory in CN X (aka GSA)

A

Sup ganglion

46
Q

Ganglion responsible for special visceral or general visceral (SVA and GVA) in CN X

A

inf ganglion

47
Q

Emergence and passage of CN X

A

from posterolateral sulcus of rostral medulla and passes through jugular foramen with CN XI, XII and int. jugular vein

48
Q

Contain afferent components of CN X

A

the sup and inf ganglia have psuedounipolar cell bodies which contain the afferent components exactly like CN IX

49
Q

Psuedounipolar cells have processes at the _____, axons that extend to have cell bodies housed in ______, and central processes that project to ____

A

target tissue
ganglion
nuclei

50
Q

_____ caries SVE fibers from nucleus ambiguous to the soft palate, pharynx, intrinsic laryngeal m., and the palatoglossus

A

Vagus n. CN X

51
Q

Major branches of CN X

A

Pharyngeal n., external laryngeal, and recurrent laryngeal n.

52
Q

Pharyngeal n. branch of CN X does what

A

goes to all muscles of the pharynx (EXCEPT stylopharyngeus-CN IX) and palate (Except tensor veli palatine)

53
Q

Goes to all m. of the pharynx (except stylopharyngeal m.) and of palate (except tensor veli palatine)

A

pharyngeal n. branch of CN X

54
Q

external laryngeal n. branch of CN X

A

to the cricothyroid and inf. pharyngeal cons

55
Q

goes to the cricothyroid and inf. pharyngeal cons

A

external laryngeal branch of CN X

56
Q

recurrent laryngeal n.

A

goes to all laryngeal m. except cricothyroid

57
Q

goes to all laryngeal m. except the cricothyroid

A

recurrent laryngeal n. branch of CN X

58
Q

on the left side of the body recurrent larygeal n.

A

travels down and loops under the arch of aorta and comes back up to innervate all of the laryngeal muscles; on the right side it loops around the subclavian artery before traveling up to innervate

59
Q

route of the recurrent laryngeal n. on R and L sides and where it ends up

A

On the R side the recurrent laryngeal n. travels down and loops under the aorta before going up to innervate all of the laryngeal muscles (except the cricothyroid) ; on the L side it loops around the subclavian artery before traveling up to innervate

60
Q

GVE of CN X

A

sympathetic motor info to viscera-carries presynaptic parasympathetics from dorsal motor nucleus to thoracic and abdominal viscera (ganglia are near target organ) and dec HR, Broncho-constriction, and inc parastalisis

61
Q

GSA Fibers of CN X innervate… (list 3)

A

touch, pain, and temp; innervate ext. portion of auricle (outer ear), ext. acoustic meatus (inside of ear), and dura mater of post. cranial fossa

62
Q

innervates the ext. portion of auricle (outer ear), ext acoustic meatus (inside of ear), and dura mater of post. cranial fossa for touch, pain, and temp sensations

A

GSA of CN X

63
Q

Location of CN X GSA fiber cell bodies…

Where do the central processes ascend to and how do they get there?

A

Superior ganglion of vagus n…

They will ascend to the spinal nucleus of the trigeminal n. (CNV) and secondary neurons cross over here, travel up the contralateral side, and synapse on the VPM; from here they travel to postcentral gyrus

64
Q

GSA fibers in general ascend to the ________ of the _____ n. Here, the secondary neurons will ______ and travel up the _______ and synapse on ______; from here they go to ________

A

spinal nucleus of the Trigeminal n. (CN V)
cross over and travel up the contralateral side
Synapse on VPM
From VPM they go to the postcentra gyrus

65
Q

GVA of CN X carries what and to where? Through inf or sup ganglion?

A

general visceral of tongue, pharynx, larynx, trachea, bronchi, and heart, esophagus, stomach, and intestines to the nucleus of the solitary tract

Inf ganglion b/c not GSA

66
Q

General visceral of tongue, pharynx, larynx, trachea, bronchi, heart, esophagus, stomach, and intestines is carried by GSA of CN X to what nuclei?

A

the nucleus of solitary tract

67
Q

SVA of CNX

A

Taste, relayed from the epiglottis and palate through the inf ganglion and eventually reaches the nucleus of the solitary tract

68
Q

relays taste from the epiglottis and palate through the inf ganglion and eventually reaches the nucleus of the solitary tract

A

SVA of CNX

69
Q

CN XI overview (fiber type, class)

A

Solely motor and despite debate we will say SVE-skeletal m. and from brachial arches

70
Q

nucleus of CN XI

A

is in the ventral horn of the spine; a column that extends about 5-6 vertebral columns down

71
Q

traditional cranial root of CN XI is actually

A

part of CNX, sorry 11

72
Q

of functional components of CN XI

A

one

73
Q

of functional components of CN XII

A

one

74
Q

Overview of CN XII (fiber type, class)

A

solely motor

75
Q

Nucleus of CN XII is found where

A

in the rostral medulla

76
Q

CN IX, X, and XI exit the ______ (hint: same place rootlets of CN II join)

A

pre-olivary sulcus

77
Q

CN XII rootlets join at the

A

pre-olivary sulcus

78
Q

CN XII exits the cranial vault via

A

hypoglossal canal

79
Q

Nerves from ______ join hypoglossal in its trek towards the tongue

A

CN 1-2 (cervical plexus) hitch a ride to the hyoid muscles

80
Q

CN 1-2 from the cervical plexus hitch a ride on what to get to the hyoid muscles

A

CN XII (hypoglossal n.)

81
Q

CN XII ends in many branches that supply what?

A

The intrinsic and extrinsic m. of tongue except the palatoglossus

82
Q

supply the intrinsic and extrinsic m. of the tongue (except the palatoglossus)

A

CN XII

83
Q

CN XII gives of extra branches that

A

carry the hitch-hiking CN1 and 2 down where they terminate in the lingual branches (mengeal and sup root of ansa cervicalis)

Neuro Exam 3 (7 decks)

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