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M1 Cranial Nerves > Cranial Nerves: Names and Numbers > Flashcards

Cranial Nerves: Names and Numbers Flashcards

1
Q

CN I

A

Olfactory

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2
Q

CN II

A

Optic

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3
Q

CN III

A

Oculomotor

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4
Q

CN IV

A

Trochlear

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5
Q

CN V

A

Trigeminal

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6
Q

CN VI

A

Abducens

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7
Q

CN VII

A

Facial

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8
Q

CN VIII

A

Vestibulocochlear

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9
Q

CN IX

A

Glossopharyngeal

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10
Q

CN X

A

Vagus

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11
Q

CN XI

A

Accessory

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12
Q

CN XII

A

Hypoglossal

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13
Q

CN I Function? s/m?

A

Smell. sensory only.

Only CN without thalamic relay to cortex!

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14
Q

CN II: Function? S/M?

A

Sight. Sensory

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15
Q

CN III. function? S/M?

A

eye movement (SR, IR, MR, IO). Motor only

Pupillary constriction via sphincter pupillae; Edinger-Westphal nucleus, muscarinic receptors.

Accomodation

eyelid opening (levator palpebrae)

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16
Q

CN IV: function, s/m?

A

eye movement (SO). motor only

17
Q

CN V: function, s/m?

A

Mastication, facial sensation. Both

V1: Opthalmic

V2: maxillary

V3: mandibular

sensation from anterior 2/3 of tongue

18
Q

CN VI: function, s/m?

A

eye movement (LR). Motor

19
Q

CN VII: function, s/m?

A

Both

facial movement.

Taste from anterior 2/3 tongue

Lacrimation

Salivation(submandibular, sublingual)

Eyelid closing (orbicularis oculi)

Stapedius muscle in ear

20
Q

CN VIII: function, S/M?

A

Hearing, balance. sensory

21
Q

CN IX: function, S/M?

A

both

taste, somatosensation from posterior 1/3 tongue

swallowing

salivation (parotid only)

monitors carotid body and sinus chemo and baroreceptors

stylopharyngeus (elevates pharynx, larynx)

22
Q

CN X: function, S/M?

A

both

taste from epiglottic region

swallowing

soft palate elevation

midline uvula

talking

coughing

thoracoabdominal viscera

monitoring aortic arch chemo and baroreceptors

23
Q

CN XI: function, S/M?

A

motor

head turning

shoulder shrug (SCM, trapezius)

24
Q

CN XII: function, S/M?

A

motor

tongue movement

25
Q

Corneal reflex: afferent/efferent?

A

afferent: V1/opthalmic (nasociliary branch)

Efferent: VII (temporal branch: orbularis oculi)

26
Q

Lacrimation reflex: afferent? efferent?

A

afferent: V1 (loss of this does not preclude emotional tears)
efferent: VII

27
Q

Jaw jerk reflex: afferent? efferent?

A

afferent: V3 (sensory: muscle spindle from masseter)
efferent: V3 (motor, masster)

28
Q

Pupillary reflex: afferent? efferent?

A

afferent: II
efferent: III

29
Q

gag reflex: afferent? efferent?

A

afferent: IX
efferent: X

M1 Cranial Nerves (1 decks)

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