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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
pre-synaptic parasympathetic fibers of inf. salvitory nucleus (GVE) from CN IX go down to where
hop on the tympanic nerve which goes to the tympanic plexus in the middle of the ear
26
GVE of CN IX ultimately will do what
target the parotid gland to increase salivation
27
GVE pathway of CN IX
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
28
Mediates the afferent limb of the gag reflex
GSA from CN IX
29
GSA from CN IX
mediates the afferent limb of the gag reflex
30
GSA-general somatic afferents of CN IX are
pharyngeal, tonsilar, and lingual branches of CN IX | tympanic n. too
31
GSA-General Somatic Afferents of CN IX sense what
general sensations such as pain, touch,
32
GSA of CN IX houses cell bodies in what nuclei
house GSA nuclei in sensory nuclei of CN V but then run through the superior ganglion of CN IX
33
GSAs of CN IX and where they receive from
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
34
Caries GVA info from carotid sinus (thinking CN IX)
Carotid sinus n. aka Hering's n.
35
Hering's n.
Caries GVA from carotid sinus; aka carotid sinus n.
36
senses changes in BP
a barorecpetor right near the bifurcation of the common carotid-near the carotid sinus
37
sense changes in blood gases
chemoreceptors at the bifurcation of the common carotid a.
38
chemoreceptors at the bifurcation of the common carotid
sense changes in blood gases
39
baroreceptor near carotid sinus/bifurcation of common carotid
sense changes in BP
40
Peripheral process of GVA Fibers have an axon that ascends to cell bodies in the ______ and central processes will ascend to nucleus of _______
inf. ganglion | solitary tract
41
SVA fibers of CN IX
Taste; cell bodies in inf. ganglion and central processes ascend to nucleus of solitary tract
42
Fibers of CN IX for taste
SVA
43
CN X fiber type, functional components, and nuclei number and where
Both/mixed, 5, and 4 nuclei in the medulla 3 of which are the same as CN IX
44
Nuclei in the medulla that send and receive with CN X
``` Motor -Dorsal Vagal Nucleus (GVE) -Nucleus Ambiguous (SVE) Sensory -nucleus of solitary tract (GVA and SVA) -sensory nucleus of CN V (GSA) ```
45
ganglion responsible for general sensory in CN X (aka GSA)
Sup ganglion
46
Ganglion responsible for special visceral or general visceral (SVA and GVA) in CN X
inf ganglion
47
Emergence and passage of CN X
from posterolateral sulcus of rostral medulla and passes through jugular foramen with CN XI, XII and int. jugular vein
48
Contain afferent components of CN X
the sup and inf ganglia have psuedounipolar cell bodies which contain the afferent components exactly like CN IX
49
Psuedounipolar cells have processes at the _____, axons that extend to have cell bodies housed in ______, and central processes that project to ____
target tissue ganglion nuclei
50
_____ caries SVE fibers from nucleus ambiguous to the soft palate, pharynx, intrinsic laryngeal m., and the palatoglossus
Vagus n. CN X
51
Major branches of CN X
Pharyngeal n., external laryngeal, and recurrent laryngeal n.
52
Pharyngeal n. branch of CN X does what
goes to all muscles of the pharynx (EXCEPT stylopharyngeus-CN IX) and palate (Except tensor veli palatine)
53
Goes to all m. of the pharynx (except stylopharyngeal m.) and of palate (except tensor veli palatine)
pharyngeal n. branch of CN X
54
external laryngeal n. branch of CN X
to the cricothyroid and inf. pharyngeal cons
55
goes to the cricothyroid and inf. pharyngeal cons
external laryngeal branch of CN X
56
recurrent laryngeal n.
goes to all laryngeal m. except cricothyroid
57
goes to all laryngeal m. except the cricothyroid
recurrent laryngeal n. branch of CN X
58
on the left side of the body recurrent larygeal n.
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
route of the recurrent laryngeal n. on R and L sides and where it ends up
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
GVE of CN X
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
GSA Fibers of CN X innervate... (list 3)
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
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
GSA of CN X
63
Location of CN X GSA fiber cell bodies... Where do the central processes ascend to and how do they get there?
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
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 ________
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
GVA of CN X carries what and to where? Through inf or sup ganglion?
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
General visceral of tongue, pharynx, larynx, trachea, bronchi, heart, esophagus, stomach, and intestines is carried by GSA of CN X to what nuclei?
the nucleus of solitary tract
67
SVA of CNX
Taste, relayed from the epiglottis and palate through the inf ganglion and eventually reaches the nucleus of the solitary tract
68
relays taste from the epiglottis and palate through the inf ganglion and eventually reaches the nucleus of the solitary tract
SVA of CNX
69
CN XI overview (fiber type, class)
Solely motor and despite debate we will say SVE-skeletal m. and from brachial arches
70
nucleus of CN XI
is in the ventral horn of the spine; a column that extends about 5-6 vertebral columns down
71
traditional cranial root of CN XI is actually
part of CNX, sorry 11
72
of functional components of CN XI
one
73
of functional components of CN XII
one
74
Overview of CN XII (fiber type, class)
solely motor
75
Nucleus of CN XII is found where
in the rostral medulla
76
CN IX, X, and XI exit the ______ (hint: same place rootlets of CN II join)
pre-olivary sulcus
77
CN XII rootlets join at the
pre-olivary sulcus
78
CN XII exits the cranial vault via
hypoglossal canal
79
Nerves from ______ join hypoglossal in its trek towards the tongue
CN 1-2 (cervical plexus) hitch a ride to the hyoid muscles
80
CN 1-2 from the cervical plexus hitch a ride on what to get to the hyoid muscles
CN XII (hypoglossal n.)
81
CN XII ends in many branches that supply what?
The intrinsic and extrinsic m. of tongue except the palatoglossus
82
supply the intrinsic and extrinsic m. of the tongue (except the palatoglossus)
CN XII
83
CN XII gives of extra branches that
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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