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Anatomy > CN IX, X, XI, XII > Flashcards

CN IX, X, XI, XII Flashcards

1
Q

XII axon type? origin? Peripheral termination?

A

GSE, hypoglossal nucleus, tongue muscles

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2
Q

What muscle that protrueds the tongue is innervated by XII

A

Genioglossus m.

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3
Q

A hypoglossal nerve lesion is associated with what 4 things?

A

LMN lesion
Deviation toward side of lesion
Fasciculations
Atrophy

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4
Q

A Corticobulbar lesion is associated with what 3 things?

A
  • Deviation toward side opposite UMN lesion
  • No fasciculations
  • Minimal atrophy
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5
Q

XI axon type? origin? Peripheral termination?

A

SVE, Accessory nucleus in C-spine (caudal medulla to C5). Sternomastoid, traps mm.

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6
Q

3 effects of accessory nerve lesion on trapezius?

A

1) Scapula/clavicle hang due to weakness
2) Weak shoulder shrug as levator scapulae m. must work alone.
3) Muscle atrophy leads to scalloped appearance of neck contour

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7
Q

How might an Accessory nerve lesion on the trapezius occur?

A

Damage from lymphadenectomy surgery for treatment of head/neck cancers.

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8
Q

Axon type for CN IX and X?

A

all of them, sick.

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9
Q

CNS origin/termination for IX SSA/GVA axons? PNS?

A

CNS Origin: nucleus of solitary tract

PNS:
SSA: Posterior 1/3 taste buds
GVA: Carotid body/sinus

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10
Q

CNS/PNS origin/termination for IX GSA

A

CNS: spinal trigeminal nucleus
PNS: Mucosa posterior 1/3, pharynx, middle ear, outer ear skin

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11
Q

CNS/PNS origin/termination for IX GVE

A

CNS: Inferior salivatory nucleus, Otic ganglion
PNS: Parotid gland

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12
Q

CNS/PNS origin/termination for IX SVE

A

CNS: Nucleus ambiguus
PNS: Pharynx (stylopharyngeus)

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13
Q

Carotid body sends IX afferents in association with what?

A

Blood O2, CO2 and pH

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14
Q

Carotid sinus sends IX afferents in association with what?

A

Changes in BP

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15
Q

Pain associated with glossopharyngeal neuralgia begins where? then radiates where?

A

Posterior tongue/pharynx wall, radiates to ear

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16
Q

How glossopharyngeal neuralgia is treated (2)

A
  • Meds

- Tractotomy of spinal trigeminal tract in caudal medulla

17
Q

CNS/PNS origin/termination for X GSA

A

CNS: Spinal trigeminal nucleus/superior ganglion of X
PNS: Skin of outer ear

18
Q

CNS/PNS origin/termination for X SVA

A

CNS: Nucleus of solitary tract/inferior ganglion of X
PNS: Taste buds: epiglottis and esophagus.

19
Q

CNS/PNS origin/termination for X GVA

A

CNS: Nucleus of solitary tract/inferior ganglion of X
PNS: Thoracid/abdominal viscera. Mucosa of larynx/pharynx. Stretch receptors aortic arch. Chemoreceptors aortic bodies

20
Q

CNS/PNS origin/termination for X GVE

A

CNS: DMNX, nucleus ambiguus
PNS: Thoracic/abdominal viscera: smooth muscle/glands

21
Q

CNS/PNS origin/termination for X SVE

A

CNS: Nucleus ambiguus
PNS: Larynx/pharynx.

22
Q

Soft palate innervation from cn

A

VII

23
Q

Epiglottis innervation

A

X

24
Q

Circumvallate papillae innervation

A

IX

25
Q

Foliate papillae innervation

A

IX and VII

26
Q

Fungiform papillae innervation

A

VII

27
Q

Oral epithelium of anterior 2/3 innervation

A

V

28
Q

Taste to anterior 2/3

A

VII

29
Q

Posterior 1/3 pain/temp and taste

A

IX

30
Q

Stylopharyngeus innervation

A

IX

31
Q

Pharynx (besides stylopharyngeus) innervation

A

X

32
Q

DMNX innervates all viscera up to what structure

A

Transverse colon

33
Q

Nucleus ambiguus lateral and medial efferents innervate what respectively

A

L: speech/swallowing muscles
M: heart and lungs

34
Q

To what age could tongue thrust reflex last

A

8

35
Q

Afferent and efferent limbs for tongue thrust reflex

A

A: V or IX
E: XII

36
Q

Afferent and efferent component of gag reflex?

A

A: IX
E: X

Anatomy (11 decks)

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