Cranial Nerves Flashcards

1
Q

CN I

A

olfactory nerve

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2
Q

CN I - Components

A

special sensory (olfaction)

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3
Q

CN I - Actions

A

SpS: carries afferent impulses for the sense of smell

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4
Q

CN II

A

optic nerve

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5
Q

CN II - Components

A

special sensory (vision)

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6
Q

CN II - Actions

A

SpS: carrying afferent impulses for vision

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7
Q

CN III

A

oculomotor nerve

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8
Q

CN III - Components

A

somatic motor

visceral motor

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9
Q

CN III - Actions

A

SM: innervation to 4 of 6 extraocular muscles
functions in proprioception
VM: innervation (pupil and ciliary muscles)

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10
Q

CN IV

A

trochlear nerve

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11
Q

CN IV - Components

A

somatic motor

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12
Q

CN IV - Actions

A

SM: innervates the superior oblique muscles (turns eye inferolaterally)

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13
Q

CN V

A

trigeminal nerve

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14
Q

Divisions of CN V (3)

A

opthalmic
maxillary
mandibular

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15
Q

CN V*1

A

opthalmic nerve

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16
Q

CN V*1 - Components

A

somatic sensory

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17
Q

CN V*1 - Actions

A

SS: sensation from cornea, forehead, scalp, eyelids, nose and mucosa of nasal cavity

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18
Q

CN V*2

A

maxillary nerve

19
Q

CN V*2 - Components

A

somatic sensory

20
Q

CN V*2 - Actions

A

SS: sensation of skin over maxilla and palate

21
Q

CN V*3

A

mandibular nerve

22
Q

CN V*3 - Components

A

somatic sensory

somatic motor

23
Q

CN V*3 - Actions

A

SS: sensation from skin over mandible and anterior 2/3 of tounge
SM: muscles of mastication

24
Q

CN VI

A

abducent nerve

25
Q

CN VI - Components

A

somatic motor

26
Q

CN VI - Actions

A

SM: innervates lateral rectus muscle (lateral eye movement)

27
Q

CN VII

A

facial nerve

28
Q

CN VII - Components

A

somatic motor
somatic sensory
special sensory
visceral motor

29
Q

CN VII - Actions

A

SM: facial expressions
SS: sensation from skin of external acoustic meatus
SpS: taste from anterior 2/3 of tongue
VM: tranmittal of autonomic impulses to lacrimal and salivary glands

30
Q

CN VIII

A

vestibulocochlear nerve

31
Q

CN VIII - Components

A

special sensory

32
Q

CN VIII - Actions

A

SpS: hearing (cochlear) and balance/equilibrium (vestibular)

33
Q

CN IX

A

glossopharyngeal nerve

34
Q

CN IX - Components

A
somatic motor
somatic sensory
special sensory
visceral motor
visceral sensory
35
Q

CN IX - Actions

A

SM: innervates part of tongue and pharynx
SS: external ear, pharynx, middle ear
SpS: taste from posterior 1/3 of tongue
VM: motor fibers to parotid salivary gland
VS: carotid sinus

36
Q

CN X

A

vagus nerve

37
Q

CN X - Components

A
somatic motor
somatic sensory 
special sensory
visceral motor
visceral sensory
38
Q

CN X - Actions

A

SM: muscles of pharynx, larynx, superior 2/3 esophagus
SS: sensation from auricle and external acoustic meatus and tympanic membrane
SpS: taste from epiglottis and palate
VM: parasympathetic fibers to heart, lungs, and visceral organs
VS: sensation from root of tongue, heart, lungs, visceral organs, aortic body and arch

39
Q

CN XI

A

accessory nerve

40
Q

CN XI - Components

A

somatic motor

41
Q

CN XI - Actions

A

SM: innervates trapezius and sternocleidomastoid and fibers of larynx, pharynx, and soft palate

42
Q

CN XII

A

hypoglossal nerve

43
Q

CN XII - Components

A

somatic motor

44
Q

CN XII - Actions

A

SM: innervates intrinsic and extrinsic muscle of tongue (swallowing and speech)