Cranial Nerves Flashcards

1
Q

How many cranial nerves are there

A

12 pairs

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2
Q

What is CN I

A

Olfactory

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3
Q

What is CN II

A

Optic

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4
Q

What is CN III

A

Oculomotor

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5
Q

What is CN IV

A

Trochlear

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6
Q

What is CN V

A

Trigeminal

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7
Q

What is CN VI

A

Abducens

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8
Q

What is CN VII

A

Facial

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9
Q

What is CN VIII

A

Vestibulocochlear

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10
Q

What is CN IX

A

Glossopharyngeal

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11
Q

What is CN X

A

Vagus

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12
Q

What is CN XI

A

Accessory

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13
Q

What is CN XII

A

Hypoglossal

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14
Q

What do efferent (motor) nerves do

A

Carry information from the brain to the periphery

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15
Q

What do afferent (sensory) nerves do

A

Carry information from the periphery to the brain

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16
Q

Is the olfactory nerve (S,M or both)

A

Sensory

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17
Q

Is the optic nerve (S,M or both)

A

Sensory

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18
Q

Is the oculomotor nerve (S,M or both)

A

Motor

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19
Q

Is the trochlear nerve (S,M or both)

A

Motor

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20
Q

Is the trigeminal nerve (S,M or both)

A

Both

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21
Q

Is the abducens nerve (S,M or both)

A

Motor

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22
Q

Is the facial nerve (S,M or both)

A

Both

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23
Q

Is the vestibulocochlear nerve (S,M or both)

A

Sensory

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24
Q

Is the glossopharyngeal nerve (S,M or both)

A

Both

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25
Q

Is the vagus nerve (S,M or both)

A

Both

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26
Q

Is the accessory nerve (S,M or both)

A

Motor

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27
Q

Is the hypoglossal nerve (S,M or both)

A

Motor

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28
Q

What is a somatic nerve

A

Carries information to/from the skin or skeletal muscles

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29
Q

What is a visceral nerve

A

Carries information to/from internal organs

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30
Q

What is the function of the olfactory nerve

A

Sense of smell

31
Q

What is the function of the optic nerve

A

Sense of sight

32
Q

What is the function of the oculomotor nerve

A

Controls lens shape
Iris diameter
Movement of inferior oblique and rectus m

33
Q

What is the function of the trochlear nerve

A

Movement of superior oblique m

34
Q

What is the function of the trigeminal nerve

A

Motor - mastication and floods of mouth
Sense - for face, skin, mouth, nose and eyes

35
Q

What is the function of the abducens nerve

A

Movement of lateral rectus m

36
Q

What is the function of the facial nerve

A

Motor - muscles of facial expression, salivation
Sensory - taste anterior 2/3 of tongue

37
Q

What is the function of the vestibulocochlear nerve

A

Sensory - equilibrium and hearing

38
Q

What is the function of the glossopharyngeal nerve

A

Motor - pharyngeal muscles for gagging, swallowing, uvula and salivation
Sensory - taste posterior 1/3 of tongue

39
Q

What is the function of the vagus nerve

A

Motor/sensory - pharynx and larynx - abdominal viscera
Motor - heart

40
Q

What is the function of the accessory nerve

A

Proprioception in soft palate, pharynx, larynx, head and shoulders
Motor - movement of sternocleidomastoid, trapezius

41
Q

What is the function of the hypoglossal nerve

A

Motor - tongue

42
Q

Which skull foramina does the olfactory nerve exit from

A

Cribriform plate

43
Q

Which skull foramina does the optic nerve exit from

A

Optic canal

44
Q

Which skull foramina does the oculomotor nerve exit from

A

Superior orbital fissure

45
Q

Which skull foramina does the trochlear nerve exit from

A

Superior orbital fissure

46
Q

Which skull foramina does the abducens nerve exit from

A

Superior orbital fissure

47
Q

Which skull foramina does the facial nerve exit from

A

Internal acoustic meatus

48
Q

Which skull foramina does the vestibulocochlear nerve exit from

A

Internal acoustic meatus

49
Q

Which skull foramina does the glossopharyngeal nerve exit from

A

Jugular foramen

50
Q

Which skull foramina does the vagus nerve exit from

A

Jugular foramen

51
Q

Which skull foramina does the accessory nerve exit from

A

Jugular foramen

52
Q

Which skull foramina does the hypoglossal nerve exit from

A

Hypoglossal canal

53
Q

List the 3 trigeminal nerves

A

Opthalmic - V1
Maxillary - V2
Mandibular - V3

54
Q

What is the function of the opthalmic nerve

A

Sensory to skin of the upper third of the face

55
Q

What is the function of the maxillary nerve

A

Sensory to middle third of the face, upper teeth and upper jaw

56
Q

What is the function of the mandibular nerve

A

Sensory to lower third of the face, the lower jaw and anterior 2/3 of the tongue
Motor to the muscles of mastication

57
Q

Which skull foramina does the opthalmic nerve exit from

A

Superior orbital fissure

58
Q

Which skull foramina does the maxillary nerve exit from

A

Foramen rotundum

59
Q

Which skull foramina does the mandibular nerve exit from

A

Foramen ovale

60
Q

Which nerve does the foramen spinosum allow to exit

A

The mandibular meningeal branch

61
Q

Which foramina does the mandibular meningeal branch exit from

A

Foramen spinosum

62
Q

Why are the cranial nerves part of the peripheral nervous system

A

Because they innervate anatomical structures of the head and neck and do not solely stay within the central nervous system

63
Q

What is the origin of the olfactory nerve

A

Olfactory epithelium

64
Q

What is the origin of the optic nerve

A

Retina

65
Q

What is the origin of the oculomotor nerve

A

Midbrain

66
Q

What is the origin of the trochlear nerve

A

Midbrain

67
Q

What is the origin of the trigeminal nerve

A

Pons

68
Q

What is the origin of the abducens nerve

A

Pons

69
Q

What is the origin of the facial nerve

A

Pons

70
Q

What is the origin of the vestibulocochlear nerve

A

Cochlea and semi circular canals

71
Q

What is the origin of the glossopharyngeal nerve

A

Medulla oblongata

72
Q

What is the origin of the vagus nerve

A

Medulla oblongata

73
Q

What is the origin of the accessory nerve

A

Medulla oblongata

74
Q

What is the origin of the hypoglossal nerve

A

Medulla oblongata