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Anatomy unit 3 > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

CN I

A

Olfactory

Note: Consists of multiple small fibers off the olfactory bulb-the bulb sits in the cribriform plate.

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2
Q

CN I Motor/sensory/both

A

Special Sensory (smell)

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3
Q

CN I source

A

Frontal Lobe

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4
Q

CN I Skull foramen/destination

A

Foremina in cribiform plate

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5
Q

CN I innervates

A

Superior epithelium of nasal cavity for smell

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6
Q

CN II

A

Optic Nerve

Note: Left and right optic nerves unite at the optic chiasm on the inferior aspect of the brain, then continue into the brain as the optic tracts.

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7
Q

CN II Motor/Sensory/both

A

Special sensory (vision)

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8
Q

CN II Source

A

Diencephalon

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9
Q

CN II skull foramen/ destination

A

Optic canal

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10
Q

CN II Innervates

A

Retina of eyeball for vision

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11
Q

CN III

A

Oculomotor

Note:A parasympathetic ganglion-the ciliary ganglion-is associated with this nerve.

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12
Q

CN III Motor/sensory/both

A

Motor-somatic and parasympathetic

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13
Q

CN III Source

A

Midbrain

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14
Q

CN III Skull foramen/destination

A

Superior orbital fissure

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15
Q

CN III Innervates

A

Somatic muscles in orbit, parasympathetic innervation to muscles of iris and ciliary muscles controlling lens shape

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16
Q

CN IV

A

Trochlear nerve

Notes: Small-wraps around back of midbrain and enters into dura.

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17
Q

CN IV M/S/B

A

Motor-Somatic

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18
Q

CN IV source

A

Midbrain

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19
Q

CN IV skull foramen/destination

A

Superior Orbital fissure

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20
Q

CN IV innervates

A

Motor to superior oblique muscle in orbit

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21
Q

CN V1

A

trigeminal nerve-ophthalmic division

Note: All branches of CN V also provide sensory innervation to dura mater.

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22
Q

CN V1 M/S/B

A

Sensory-somatic

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23
Q

CN V1 source

A

Pons

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24
Q

CN V1 skull foramen

A

Superior orbital fissure

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25
Q

CN V1 innervation

A

Sensation of the orbit, superior nasal cavity, forehead

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26
Q

CN V2

A

Trigeminal nerve- maxillary division

Passes deeply through maxilla to emerge from infraorbital foramen. Parasympathetics are from connections to CN VII. All branches of CN V also provide sensory innervation to dura mater.

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27
Q

CN V2 M/S/B

A

Sensory-somatic

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28
Q

CN V2 Source

A

Pons

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29
Q

CN V2 skull foramen/destination

A

Foramen torundum

30
Q

CN V2 innervates

A

Sensation of skin of face over upper jaw, upper teeth, inferior/posterior nasal cavity, palate in oral cavity

31
Q

CN V3

A

Trigeminal nerve- mandibular division

Note: Passes inferiorly through foramen ovale into infratemporal fossa. Parasympathetic fibers are from connections to CN VII and CN IX.

32
Q

CN V3 M/S/B

A

Sensory-somatic
Motor-Somatic

33
Q

CN V3 source

A

Pons

34
Q

CN V3 skull foramen/destination

A

Foramen rotundum

35
Q

CN V3 innervates

A

Sensation of skin over lower jaw, side of head, lower teeth, oral cavity, anterior 2/3 of tongue. Motor to muscles of mastication, some palatal/ear muscles.

36
Q

CN VI

A

Abducens

37
Q

CN VI M/S/B

A

Motor-somatic

38
Q

CN VI source

A

Junction between pons and medulla

39
Q

CN VI skull foramen/destination

A

Superior orbital fissure

40
Q

CN VI innervates

A

Motor to lateral rectus muscle in orbit

41
Q

CN VII

A

Facial nerve

Note: Brings parasympathetic fibers to peripheral branches of V2 and V3 via greater petrosal nerve and chorda tympani. These branches allow taste innervation to anterior 2/3 of tongue via lingual nerve, and passage of parasympathetic motor fibers to peripheral glands.

42
Q

CN VII M/S/B

A

Special sensory- taste from anterior 2/3 of tongue
Motor-Somatic and parasympathetic

43
Q

CN VII Source

A

Junction between pons and medulla

44
Q

CN VII Skull foramen/destination

A

Internal acoustic meatus to facial canal, out stylomastoid foramen in floor of temporal bone

45
Q

CN VII innervation

A

Sensation of taste to anterior 2/3 of tongue. Somatic motor control to muscles of facial expression, stapedius muscle in ear, posterior digastric and stylohyoid. Parasympathetic innervation to glands of orbit/nose, submandibular and sublingual salivary glands.

46
Q

CN VIII

A

Vestibulocochlear nerve
Note: Divides in temporal bone into two divisions, vestibular to semicircular canals and cochlear to cochlea.

47
Q

CN VIII S/M/B

A

Special sensory- balance and hearing

48
Q

CN VIII source

A

Junction between pons and medulla

49
Q

CN VIII skull foramen/destination

A

internal acoustic meatus

50
Q

CN VIII innervates

A

Special sensory innervation to semicircular canals(Balance) and cochlea (hearing)

51
Q

CN IX

A

Glossopharyngeal nerve

Note: Contributes parasympathetic fibers to CN V3 and innervates carotid sinus/body with parasympathetic fibers

52
Q

CN IX S/M/B

A

Special sensory-taste from posterio 1/3 of tongue
Sensory- somatic and visceral
Motor-Somatic and parasympathetic

53
Q

CN IX source

A

Medulla

54
Q

CN IX skull foramen/destination

A

Jugular foramen

55
Q

CN IX innervates

A

Taste and general sensation to posterior 1/3 of tongue, soft palate, and pharynx near tongue, general sensation of tympanic cavity, tympanic membrane, auditory tube. Somatic motor innervation to stylopharyngeus muscle, parasympathetic innervation to parotid gland, visceral sensory innervation to carotid bifurcation for blood pressure control

56
Q

CN X

A

Vagus
Note: Passes inferiorly through neck to provide parasympathetic innervation to thorax and abdomen.

57
Q

CN X S/M/B

A

Special sensory- taste to pharynx
Sensory-somatic and visceral
Motor-somatic and parasympathetic

58
Q

CN X source

A

Medulla

59
Q

CN X skull foramen/destination

A

jugular foramen

60
Q

CN X innervates

A

Special sensory innervation of taste to palate/epiglottis, general sensory innervation from epiglottis, larynx. Visceral sensory innervation to GI tract, thorax, abdomen. Somatic motor innervation to pharynx, larynx, palatal muscles. Parasympathetic motor innervation to GI tract, thorax, abdomen.

61
Q

CN XI

A

Spinal accessory nerve

62
Q

CN XI M/S/B

A

Motor-somatic

63
Q

CN XI source

A

Medulla

64
Q

CN XI skill foramen/destination

A

Jugular foramen

65
Q

CN XI innervates

A

Sternocleidomastoid, trapezius

66
Q

CN XII

A

Hypoglossal nerve

Note: Visible in neck just superior to carotid bifurcation

67
Q

CN XII M/S/B

A

Motor-somatic

68
Q

CN XII source

A

Medulla

69
Q

CN XII skull foramen/destination

A

Hypoglossal canal

70
Q

CN XII innervates

A

Intrinsic and extrinsic muscles of tongue( not palatoglossus)

Anatomy unit 3 (4 decks)

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