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Cranial Nerves > Basics > Flashcards

Basics Flashcards

1
Q

Olfactory: exit

A

Cribiform plate (ethmoid bone)

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2
Q

Olfactory: number

A

CN 1

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3
Q

CN 1: name

A

Olfactory

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4
Q

Optic: function

A

Special sense: sight

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5
Q

Optic: exit

A

Optic canal- sphenoid bone

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6
Q

CN II: name

A

Optic

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7
Q

optic: number

A

CN II

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8
Q

Occulomotor: number

A

CN III

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9
Q

CN III: name

A

Occulomotor

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10
Q

Occulomotor: function

A

Motor- extraoccular muscles except superior oblique and lateral rectus

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11
Q

Occulomotor: exit

A

Superior orbital fissure

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12
Q

CN IV:name

A

Trochlear

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13
Q

Trochlear: number

A

CN IV

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14
Q

Trochlear: function

A

Motor: superior oblique muscle

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15
Q

Trochlear: exit

A

Superior orbital fissure

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16
Q

CN V: name

A

Trigeminal

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17
Q

Trigeminal: number

A

CN V

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18
Q

Trigeminal: branches

A

V1: ophthalmic
V2: maxillary
V3: mandibular

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19
Q

Trigeminal: function

A

Sensory: skin of face and mucous membranes and sinuses

V3: also motor- muscles of mastication and tensor tympani

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20
Q

Trigeminal: exit

A

V1: superior orbital fissure
V2: foramen rotundum (then superior orbital fissure)
V3: foramen ovale

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21
Q

CN VI: name

A

Abducens

22
Q

Abducens: number

A

CN VI

23
Q

Abducens: function

A

Motor- lateral rectus muscle

24
Q

Abducens: exit

A

Superior orbital fissure

25
Q

CN VII: name

A

Facial

26
Q

Facial: number

A

CN VII

27
Q

What’s the difference between facial nerve and CN VII?

A

“Facial nerve proper” means the motor portion. CN VII also has greater petrosal (carries parasympathetic fibres) and special sense (chorda tympani) branches before exiting skull.

28
Q

Facial: route and branches

A

Motor and sensory roots fuse (=geniculate ganglion) then gives off 3 interracial branches (greater petrosal nerves, nerve to stapedius and chorda tympani)
(Exits at stylomastoid foramen)
3 motor branches (posterior auricular, nerve to digastric, nerve to stylohyoid)

Then last 5 branches:

  • temporal
  • zygomatic
  • buccal
  • marginal mandibular
  • cervical
29
Q

CN VIII: name

A

Vestibulocochlear

30
Q

Vestibulocochlear: number

A

CN VIII

31
Q

Vestibulocochlear: function

A

Special sense: hearing (+ balance)

32
Q

Vestibulocochlear: exit

A

Internal acoustic meatus (temporal bone)

33
Q

Facial: function

A

Motor: muscles of facial expression, stapedius, post. belly of digastric, and stylohyoid

Special sense: anterior 2/3 of tongue

34
Q

Glossopharyngeal: number

A

CN IX

35
Q

CN IX: name

A

Glossopharyngeal

36
Q

Glossopharyngeal: function

A

Sensory: Middle ear, eustacian tube, carotid body and sinus, oropharynx and post. 1/3 of tongue, palatine tonsils
Special sense: post. 1/3 of tongue
Motor: stylopharyngeus

37
Q

Glossopharyngeal: exit

A

Jugular foramen

38
Q

Vagus: number

A

CN X

39
Q

CN X: name

A

Vagus

40
Q

Vagus: function

A

Sensory: laryngopharynx, larynx, oesophagus, external ear, aortic arch and body, thoracic and abdominal viscera

Motor: soft palate, pharynx, larynx, upper oesophagus

41
Q

Vagus: exit

A

Jugular foramen

42
Q

CN XI : name

A

Spinal accessory

43
Q

Spinal accessory: number

A

CN XI

44
Q

Spinal accessory: function

A

Motor: trapezius and sternocleidomastoid

45
Q

Spinal accessory: exit

A

Jugular foramen

46
Q

Hypoglossal: number

A

CN XII

47
Q

CN XII: name

A

Hypoglossal

48
Q

Hypoglossal: function

A

Motor: extrinsic and intrinsic muscles of tongue

49
Q

Hypoglossal: exit

A

Hypoglossal canal

50
Q

Olfactory: function

A

Special sense- olfaction

Cranial Nerves (2 decks)

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