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anatomy > N4: cranial nerves > Flashcards

N4: cranial nerves Flashcards

1
Q

CN I

A

olfactory nerve

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2
Q

CN II

A

optic nerve

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3
Q

CN III

A

occulomotor nerve

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4
Q

CN IV

A

trochlear nerve

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5
Q

CN V

A

trigeminal nerve

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6
Q

CN V1

A

opthalamic nerve

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7
Q

CN V2

A

maxillary nerve

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8
Q

CN V3

A

mandibular nerve

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9
Q

CN VI

A

abducens nerve

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10
Q

CN VII

A

facial nerve

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11
Q

CN VIII

A

vestibulocochlear nerve

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12
Q

CN IX

A

glossopharangeal nerve

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13
Q

CN X

A

vagus

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14
Q

CN XI

A

spinal accessory nerve

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15
Q

CN XII

A

hypoglossal nerve

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16
Q

where does CNI exit skull

A

Cribriform plate

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17
Q

where does CNII exit skull

A

Optic canal

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18
Q

where does CNIII exit skull

A

Superior orbital fissure

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19
Q

where does CNIV exit skull

A

Superior orbital fissure

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20
Q

where does CNV1 exit skull

A

Superior orbital fissure

21
Q

where does CNV2 exit skull

A

foramen rotundum

22
Q

where does CNV3 exit skull

A

foramen ovale

23
Q

where does CNVI exit skull

A

Superior orbital fissure

24
Q

where does CNVII exit skull

A

internal acoustic meatus -> stylomastoid fossa

25
Q

where does CNVIII exit skull

A

internal acoustic meatus

26
Q

where does CNIX exit skull

A

jugular foramen

27
Q

where does CNX exit skull

A

jugular foramen

28
Q

where does CNXI exit skull

A

jugular foramen

29
Q

where does CNXII exit skull

A

hypoglossal canal

30
Q

olfactory nerve function

A

sensory -> smell

31
Q

optic nerve function

A

sensory -> vision

32
Q

occulomotor nerve function

A

motor = skeletal and autonomic
GSM: 4 extrinsic eye muscles and levator palpebrae superioris
GVM: pupillary sphincter

33
Q

trochlear nerve function

A

motor = skeletal
Superior oblique muscle of eye

34
Q

opthalamic nerve function

A

sensory
Scalp, forehead and nose.

35
Q

maxillary nerve function

A

sensory
Cheeks, lower eye lid, nasal mucosa, upper lip, upper teeth and palate.

36
Q

mandibular nerve function

A

sensory and motor
GSS: anterior 2/3 tongue, skin over mandible and lower teeth
SVM: muscles of mastication.

37
Q

abducens nerve function

A

motor = skeletal
Lateral rectus

38
Q

facial nerve function

A

sensory and motor
GSS: sensation to part of ext. ear.SVS: taste from ant. 2/3 tongue, hard and soft palate.
SVM: muscles of facial expression.
GVM: lacrimal, submandibular, sublingual glands and mucous glands of mouth and nose.

39
Q

vestibulocochlear nerve function

A

sensory
hearing and balance

40
Q

glossopharangeal nerve function

A

motor and sensory
GSS: post. 1/3 tongue, ext. ear, and middle ear cavity.GVS: carotid body and sinus.
SVS: taste from post. 1/3 tongue.
GVM: parotid gland.
SVM: stylopharyngeus

41
Q

vagus nerve function

A

sensory and motor
GSS: ext. ear, larynx and pharynx.GVS: larynx, pharynx and, thoracic & abdominal viscera.
SVS: taste from epiglottis region of tongue
GVM: smooth muscles of pharynx, larynx and most of the GIT.
SVM: most muscles of pharynx and larynx.

42
Q

spinal accessory nerve function

A

motor = skeletal + pharangeal
GSM: trapezius and sternocleidomastoid.
SVM: a few fibres run with CNX to viscera.

43
Q

hypoglossal nerve function

A

motor = skeletal
Intrinsic and extrinsic tongue muscles (except the palatoglossus).

44
Q

rules of cranial nerves

A
  1. Nuclei are approximately located at the level of where the nerve itself emerges but are drawn on the dorsal surface.
  2. Each sub-function (Motor, Sensory, Autonomic) must associate with a different nucleus
  3. Motor is medial, and sensory is lateral (autonomic in between)
45
Q

where do optic nerves cross?

A

optic chiasm

46
Q

anatomical course of oculomotor nerve

A

oculomotor nucleus (midbrain) -> superior orbital fissure

47
Q

motor functions of superior branch of oculomotor nerve

A

Superior rectus – elevates the eyeball
Levator palpabrae superioris – raises the upper eyelid.

48
Q

motor functions of inferior branch of oculomotor nerve

A

Inferior rectus – depresses the eyeball
Medial rectus – adducts the eyeball
Inferior oblique – elevates, abducts and laterally rotates the eyeball

49
Q

structures recieving parasympathetic innervation from the oculomotor nerve

A

Sphincter pupillae – constricts the pupil, reducing the amount of light entering the eye.
Ciliary muscles – contracts, causes the lens to become more spherical, and thus more adapted to short range vision

anatomy (15 decks)

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