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SHB Exam 1 > Cranial Nerve Details > Flashcards

Cranial Nerve Details Flashcards

1
Q

What are the 2 classes of fcn for CN III?

A

GSE and GVE

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2
Q

What is the GSE fcn of CN III?

A

Inf, sup, med recti mm, inf oblique and palpabrae superioris mm.

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3
Q

What is the GVE fcn of CN III?

A

Parasymp to constrictor pupillae (constriction) and ciliary mm. (accomodation/focussing)

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4
Q

What are some unique features of the trochlear n.?

A
  • only n. that exits dorsal brain
  • only n. where all lower motor neuron fibers decussate
  • longest intracranial course
  • smallest # of axons
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5
Q

What mm. does the anterior trunk of V-1 innervate?

A

Mm. of mastication and anterior belly digastric.

- mastication mm: temporalis, masseter, lateral pterygoid, medial pterygoid

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6
Q

What is the GSA innervation of V2?

A

Skin at mid-face, upper teeth, nasal and palatal mucosa

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7
Q

What is the SVE innervation of CN V?

A

Mm. of mastication, anterior belly digastric, tensor tympani, mylohyoid, tensor palatini (1st arch mm.)

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8
Q

What are the 3 terminal branches of V1?

A

NFL
Nasociliary
Frontal–supraorbital (lateral), supratrochlear (medial)
Lacrimal

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9
Q

What is “Standing Room Only Stupid”?

A 
The order of foramina:
Superior orbital fissure
Rotundum
Ovale
Spinosum
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10
Q

What CN do you use to force your eyes closed?

A

CN VII

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11
Q

What CN do you use when you look at bright lights?

A

CN III (sphincter pupillae)

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12
Q

What CN do you use to open your eyes?

A

CN III (levator palpabrae)

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13
Q

Which n. opens the pupils wide? Extra wide?

A
  • Sympathetics

- Sympathetics–tarsal m. of Mueller

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14
Q

What is the GVA innervation of CN VII?

A

Deep sensation from soft palate

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15
Q

What is the SVA innervation of CN VII?

A

Taste from ant 2/3 tongue

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16
Q

What is the GVE innervation of CN VII?

A

Motor to sublingual, submandibular, lacrimal glands, + glands of nasopharynx and hard/soft palates.

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17
Q

What is the SVE innervation of CN VII?

A

Motor to mm. of facial expression, post belly digastric, stylohyoid, stapedius

18
Q

What is the GSA innervation of CN VII?

A

Small part of ear pinna sensation

19
Q

Corda tympani travels to the tongue via what n.?

A
  • Lingual n.
20
Q

Lingual n. is a branch of what n.?

A

V-3

21
Q

(not good question?) What glands does the corda tympani supply? What supplies the other glands of the facial n.?

A
  • Submandibular and sublingual glands

- Greater petrosal n.

22
Q

CN VII enters the skull at the ___________ and exits the skull at the ___________.

A
  • Internal acoustic meatus

- Stylomastoid foramen

23
Q

What is the GVA innervation of CN IX?

A

Deep sensation from post tongue, soft palate, pharynx, mucosa of tymp cavity, post auditory tube, carotid body and sinus

24
Q

What is the SVA innervation of CN IX?

A

Taste post 1/3 tongue and adjacent pharynx

25
Q

What is the GVE innervation of CN IX?

A

Parotid salivary gland (secretomotor)

3rd pharyngeal arch

26
Q

What is the SVE innervation of CN IX?

A

Stylopharyngeus m.

27
Q

Describe the glossopharyngeal n’s path.

A 
GLOAP:
Glossopharyngeal n.
Lesser petrosal n.
Otic ganglion
Auriculotemporal n.
Parotid gland
28
Q

What is the GVA innervation of CN X?

A

Sensory from pharynx, esophagus, trachea, larynx, and abd viscera (“neck and down”)

29
Q

What is the SVA innervation of CN X?

A

Taste buds of epiglottis and glottis

30
Q

What is the GSA innervation of CN X?

A

Sensation from small part of ear pinna, canal, and tympanic membrane

31
Q

What is the SVE innervation of CN X?

A

All mm. of pharynx (except stylopharyngeus), all mm. of the palate (except tensor veli palatini) levator palatini, all mm. of larynx, cricoid cartilage, and esophagus.

32
Q

What are sx of CN III nerve palsy?

A
  • Downward and outward gaze
  • Dilated pupil
  • Ptosis (drooping of upper eyelid)
33
Q

What are sx of CN VI nerve palsy?

A

When looking one direction, palsied eye cannot gaze laterally (remains straight forward)

34
Q

What are sx of CN VII nerve palsy?

A

Bell’s palsy: facial droop

35
Q

What are sx of CN XI nerve palsy?

A

Uneven shoulders (trapezius affected). Can affect SCM as well.

36
Q

What are sx of CN XII nerve palsy?

A

Tongue deviation in direction of lesion

37
Q

What CN’s have parsympathetics?

A

3, 7, 9, 10

38
Q

Which CN’s share the jugular foramen?

A

9, 10, 11

39
Q

Which CN’s relay sensory innervation from the ear skin?

A

7, 9, 10

40
Q

CN VII and VIII share what foramen?

A

Internal acoustic/auditory meatus

SHB Exam 1 (19 decks)

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