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Anatomy (S2)(Unit 1) > Neurology (02/04) Cranial Nerves IX, X, XI, & XII > Flashcards

Neurology (02/04) Cranial Nerves IX, X, XI, & XII Flashcards

1
Q

A patient reports a loss of pain sensation on the left side of the face after a stroke. what is the most likely location for this lesion?

A

left spinal trigeminal tract/nucleus

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2
Q

some patient with loss of pain sensation on the left side of the face. what brainstem level is most likely involved?

A

left lateral, dorsal medulla

spinal trigeminal tract is lateral in the brainstem

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3
Q

what is the axon type for CN XII?

A

somatic motor

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4
Q

what is the origin for XII?

A

hypoglossal nucleus

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5
Q

what is the peripheral termination for XII?

A

tongue mm

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6
Q

what is the main m of the tongue that XII innervates?

A

genioglossus (in charge of tongue protrusion)

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7
Q

where does XII exit the brainstem?

A

adjacent to pyramid

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8
Q

what three things result from hypoglossal nerve (LMN) lesion?

A
  • deviation TOWARD lesion
  • fasciculations [LMN]
  • atrophy [LMN]
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9
Q

CN XII also has corticobulbar fibers from the motor cortex associated with it. where do these fibers decussate?

A

adjacent to hypoglossal nucleus

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10
Q

what three things result form corticobulbar (UMN of XII) lesion?

A
  • deviation towards OPPOSITE side (bc it decussates)
  • no fasciculations [UMN]
  • minimal atrophy [UMN]
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11
Q

what type of axon type is CN XI?

A

branchial motor

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12
Q

where is the CNS origin for CN XI?

A

accessory nucleus in cervical spinal cord

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13
Q

where is the peripheral termination of CN XI?

A

sternocleidomastoid m and trapezius

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14
Q

where is the accessory nucleus located?

A

cervical spinal cord

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15
Q

what three things occur due to accessory nerve lesion on the trapezius m?

A
  • scapula and clavicle hang due to weak trapezius
  • weak shoulder shrug as levator scapulae must work alone
  • muscle atrophy leads to scalloped appearance of neck contour
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16
Q

what is the CNS origin of the somatic sensory division of CN IX?

A

spinal trigeminal nucleus/

superior ganglion of IX

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17
Q

what is the peripheral termination of the somatic sensory division of CN IX?

A

skin of outer ear

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18
Q

what is the CNS origin of the visceral sensory division of CN IX?

A

nucleus of solitary tract/

inferior ganglion of IX

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19
Q

what is the peripheral termination of the visceral sensory division of CN IX?

A

-taste buds and mucosa on posterior 1/3 of the tongue and corotid body & sinus, and pharynx and middle ear

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20
Q

what is the CNS origin of the visceral motor division of CN IX?

A

inferior salivatory nucleus/

otic ganglion

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21
Q

what is the peripheral termination of the visceral motor division of CN IX?

A

parotid gland

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22
Q

CN IX (glossopharyngeal) has afferents that are responsible for the measurement and detection of changes in blood pressure of the ____ ____ and ____ ____

A
  • carotid body

- carotid sinus

23
Q

the CN IX efferent fibers that innervate stylopharyngeus m and other pharyngeal and laryngeal mm synapse in ____ ____

A

nucleus ambiguous

24
Q

regarding glossopharyngeal neuralgia, sudden burst of pain start in the _____ _____ or wall of _____, then radiate to the ____

A
  • posterior tongue
  • pharynx
  • ear
25
regarding glossopharyngeal neuralgia, the trigger zone is on the _____/_____ and attacks are precipitated by ____ or ______
- tongue/pharynx - swallowing - talking
26
what is the CNS origin for the brachial motor axon division of CN IX?
-nucleus ambiguus
27
what is the peripheral origin of the brachial division of CN IX?
pharynx (stylopharyngeus)
28
what is the CNS origin of the somatic sensory division of CN X?
spinal trigeminal nucleus/ superior ganglion of X (same as IX)
29
what is the peripheral origin of the somatic sensory division of CN X?
skin of outer ear (same as IX)
30
what is the CNS origin of the visceral sensory division of CN X?
nucleus of the solitary tract/ inferior ganglion of X (same as IX)
31
what is the peripheral origin of the visceral sensory division of CN X?
taste buds: epiglottis &esophagus thoracic and abdominal viscera, mucosa of larynx and pharynx
32
what is the CNS origin of the visceral motor division of CN X?
dorsal motor nucleus/ | nucleus ambiguus
33
what is the peripheral termination for the visceral motor division of CN X?
thoracic and abdominal viscera
34
what is the CN origin of the brachial division of CN X?
nucleus ambiguus
35
what is the peripheral termination of the brachial division of CN X?
larynx and pharynx
36
what is the CNS nucleus that has fibers from both CN's 9 and 10?
nucleus ambiguus
37
where is the lowest point of parasympathetic innervation from the cranial nerves?
left colic flexure (anything below it is supplied by sacral)
38
the LATERAL efferent of CN X coming out of nucleus ambiguous deal with mm of ____ and _____
- speech | - swallowing
39
the MEDIAL efferents of CN X coming out of nucleus ambiguous deal with the ____ and ____
- heart | - lungs
40
regarding CN X, the ____ _____ nucleus of the vagus deals with all viscera up to transverse colon (parasympathetic)
dorsal motor
41
what nerve is the AFFERENT component of the gag reflex?
CN IX
42
what nerve is the EFFERENT component of the gag reflex/
CN X
43
concerning the gag reflex, you touch on side of the ______ to elicit a ______ response
- pharynx | - bilateral
44
what are the two possibilities for the AFFERENT component of the tongue thrust reflex?
V or IX
45
what is the EFFERENT component of the tongue thrust reflex?
XII
46
clinical consideration dealing with the response to a trigger, the vagus decreases heart rate and blood pressure, decreasing cerebral blood row, resulting in fainting and confusion
vasovagal syncope
47
clinical consideration when stimulating the vagal nerve to modulate mood or seizure activity
vagal nerve stimulator
48
what four nerves are at risk for jugular foramen syndrome?
- IX - X - XI - XII
49
concerning jugular foramen syndrome, pain in the ear is due to what two cranial nerves?
- IX | - X
50
concerning jugular foramen syndrome, headaches and meningeal irritation are due to what cranial nerve?
X
51
concerning jugular foramen syndrome, hoarseness is due to what cranial nerve?
X
52
concerning jugular foramen syndrome, dysphagia is due to what cranial nerve?
X
53
concerning jugular foramen syndrome, loss of a gag reflex is due to what two cranial nerves?
- IX | - X
54
concerning jugular foramen syndrome, the uvula deflects to side that is ______ to lesion due to the unopposed levator palati
contralateral

Anatomy (S2)(Unit 1) (10 decks)

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