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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
CN V1 innervation
Sensation of the orbit, superior nasal cavity, forehead
26
CN V2
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.
27
CN V2 M/S/B
Sensory-somatic
28
CN V2 Source
Pons
29
CN V2 skull foramen/destination
Foramen torundum
30
CN V2 innervates
Sensation of skin of face over upper jaw, upper teeth, inferior/posterior nasal cavity, palate in oral cavity
31
CN V3
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
CN V3 M/S/B
Sensory-somatic Motor-Somatic
33
CN V3 source
Pons
34
CN V3 skull foramen/destination
Foramen rotundum
35
CN V3 innervates
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
CN VI
Abducens
37
CN VI M/S/B
Motor-somatic
38
CN VI source
Junction between pons and medulla
39
CN VI skull foramen/destination
Superior orbital fissure
40
CN VI innervates
Motor to lateral rectus muscle in orbit
41
CN VII
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
CN VII M/S/B
Special sensory- taste from anterior 2/3 of tongue Motor-Somatic and parasympathetic
43
CN VII Source
Junction between pons and medulla
44
CN VII Skull foramen/destination
Internal acoustic meatus to facial canal, out stylomastoid foramen in floor of temporal bone
45
CN VII innervation
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
CN VIII
Vestibulocochlear nerve Note: Divides in temporal bone into two divisions, vestibular to semicircular canals and cochlear to cochlea.
47
CN VIII S/M/B
Special sensory- balance and hearing
48
CN VIII source
Junction between pons and medulla
49
CN VIII skull foramen/destination
internal acoustic meatus
50
CN VIII innervates
Special sensory innervation to semicircular canals(Balance) and cochlea (hearing)
51
CN IX
Glossopharyngeal nerve Note: Contributes parasympathetic fibers to CN V3 and innervates carotid sinus/body with parasympathetic fibers
52
CN IX S/M/B
Special sensory-taste from posterio 1/3 of tongue Sensory- somatic and visceral Motor-Somatic and parasympathetic
53
CN IX source
Medulla
54
CN IX skull foramen/destination
Jugular foramen
55
CN IX innervates
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
CN X
Vagus Note: Passes inferiorly through neck to provide parasympathetic innervation to thorax and abdomen.
57
CN X S/M/B
Special sensory- taste to pharynx Sensory-somatic and visceral Motor-somatic and parasympathetic
58
CN X source
Medulla
59
CN X skull foramen/destination
jugular foramen
60
CN X innervates
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
CN XI
Spinal accessory nerve
62
CN XI M/S/B
Motor-somatic
63
CN XI source
Medulla
64
CN XI skill foramen/destination
Jugular foramen
65
CN XI innervates
Sternocleidomastoid, trapezius
66
CN XII
Hypoglossal nerve Note: Visible in neck just superior to carotid bifurcation
67
CN XII M/S/B
Motor-somatic
68
CN XII source
Medulla
69
CN XII skull foramen/destination
Hypoglossal canal
70
CN XII innervates
Intrinsic and extrinsic muscles of tongue( not palatoglossus)

Anatomy unit 3 (4 decks)

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