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CMM401/501 Unit 3 Cards > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

What is this structure?

A

CN I (Olfactory)

CN I (Olfactory)

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2
Q

Motor/Sensor/Both?

A

Special sensory (Smell)

CN I (Olfactory)

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3
Q

Source?

A

Frontal lobe

CN I (Olfactory)

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4
Q

Skull Foramen?

A

Foramina in cribriform plate

CN I (Olfactory)

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5
Q

Innervates?

A
  • Consists of multiple small fibers off the olfactory bulb which sits in the cribriform plate.
  • Superior epithelium of nasal cavity for smell

CN I (Olfactory)

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6
Q

What is this structure?

A

CN II (Optic)

CN II (Optic)

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7
Q

Motor/Sensory/Both?

A

Special sensory (vision)

CN II (Optic)

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8
Q

Source?

A
  • Diencephalon
  • 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.

CN II (Optic)

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9
Q

What is this structure?

A

CN XII (Hypoglossal)

CN XI (Spinal Accessory)

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10
Q

What is this structure?

A

CN III (Oculomotor)

CN III (Oculomotor)

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11
Q

What is this structure?

A

CN IV (Trochlear)

CN IV (Trochlear)

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12
Q

What is this structure?

A

CN V1 (Trigeminal-Opthalamic)

CN V1 (Trigeminal-Opthalamic)

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13
Q

What is this structure?

A

CN V2 (Trigeminal-Maxillary)

CN V2 (Trigeminal-Maxillary)

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14
Q

What is this structure?

A

CN V3 (Trigeminal-Mandibular)

CN V3 (Trigeminal-Mandibular)

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15
Q

What is this structure?

A

CN VI (Abducens)

CN VI (Abducens)

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16
Q

What is this structure?

A

CN VII (Facial)

CN VII (Facial)

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17
Q

What is this structure?

A

CN VIII (Vestibulocochlear)

CN VIII (Vestibulocochlear)

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18
Q

What is this structure?

A

CN IX (Glossopharangeal)

CN IX (Glossopharangeal)

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19
Q

What is this structure?

A

CN X (Vagus)

CN X (Vagus)

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21
Q

Skull Foramen?

A

Optic canal

CN II (Optic)

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22
Q

Innervates?

A

Retina of eyeball for vision

CN II (Optic)

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23
Q

Sensory/Motor/Both?

A

Motor
* Somatic & Parasympathetic

CN III (Oculomotor)

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24
Q

Source?

A

Midbrain

CN III (Oculomotor)

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25
Q

Skull Foramen?

A

Superior orbital fissure

CN III (Oculomotor)

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26
Q

Innervates?

A

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

CN III (Oculomotor)

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27
Q

Sensory/Motor/Both?

A

Motor - Somatic

CN IV (Trochlear)

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28
Q

Source?

A

Midbrain

CN IV (Trochlear)

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29
Q

Skull Foramen?

A

Superior Orbital fissure

CN IV (Trochlear)

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30
Q

Innervates?

A

Motor to superior oblique muscle in orbit

CN IV (Trochlear)

31
Q

Sensory/Motor/Both?

A

Sensory - Somatic

CN V1 (Trigeminal-Opthalamic)

32
Q

Source?

A

Pons

CN V1 (Trigeminal-Opthalamic)

33
Q

Skull Foramen?

A

Superior orbital fissure

CN V1 (Trigeminal-Opthalamic)

34
Q

Innervates?

A

Sensation of orbit, superior nasal cavity, forehead

CN V1 (Trigeminal-Opthalamic)

35
Q

Sensory/Motor/Both?

A

Sensory - Somatic

CN V2 (Trigeminal-Maxillary)

36
Q

Source?

A

Pons

CN V2 (Trigeminal-Maxillary)

37
Q

Skull Foramen?

A

Foramen rotundum

CN V2 (Trigeminal-Maxillary)

38
Q

Innervates?

A

Sensation of:
* Skin of face over upper jaw
* Upper teeth
* Inferior/posterior nasal cavity
* Palate in oral cavity

Parasympathetics are from connections to CN VII. All
branches of CN V also provide sensory innervation to dura
mater.

CN V2 (Trigeminal-Maxillary)

39
Q

Sensory/Motor/Both?

A

Both
Sensory - Somatic
Motor - Somatic

CN V3 (Trigeminal-Mandibular)

40
Q

Source?

A

Pons

CN V3 (Trigeminal-Mandibular)

41
Q

Skull Foramen?

A

Foramen Ovale

CN V3 (Trigeminal-Mandibular)

42
Q

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.
  • Parasympathetic fibers are from connections to CN VII and CN IX.

CN V3 (Trigeminal-Mandibular)

43
Q

Sensory/Motor/Both?

A

Motor - Somatic

CN VI (Abducens)

44
Q

Source?

A

Junction between pons and medulla

CN VI (Abducens)

45
Q

Skull Foramen?

A

Superior orbital fissure

CN VI (Abducens)

46
Q

Innervates?

A

Motor to lateral rectus muscle in orbit

CN VI (Abducens)

47
Q

Sensory/Motor/Both?

A

Special sensory - taste from anterior 2/3 of tongue
Motor- somatic & parasympathetic

CN VII (Facial)

48
Q

Source?

A

Junction between medulla and pons

CN VII (Facial)

49
Q

Skull Foramen?

A

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

CN VII (Facial)

50
Q

Innervates?

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

CN VII (Facial)

51
Q

Sensory/Motor/Both?

A

Special sensory-balance and hearing

CN VIII (Vestibulocochlear)

52
Q

Source?

A

Junction between pons and medulla

CN VIII (Vestibulocochlear)

53
Q

Skull foramen?

A

Internal acoustic meatus

CN VIII (Vestibulocochlear)

54
Q

Innervates?

A

Two special sensory divisions:
* Innervation (Vestibular) to semicircular canals (balance)
* (Cochlear) cochlea (hearing).

CN VIII (Vestibulocochlear)

55
Q

Motor/Sensory/Both?

A
  • Special sensory-taste from posterior 1/3 of tongue
  • Sensory-somatic and visceral
  • Motor-somatic and parasympathetic

CN IX (Glossopharangeal)

56
Q

Source?

A

Medulla

CN IX (Glossopharangeal)

57
Q

Skull foramen?

A

Jugular foramen

CN IX (Glossopharangeal)

58
Q

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

CN IX (Glossopharangeal)

59
Q

Senory/Motor/Both?

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

CN X (Vagus)

60
Q

Source?

A

Medulla

CN X (Vagus)

61
Q

Skull foramen?

A

Jugular foramen

CN X (Vagus)

62
Q

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.

CN X (Vagus)

63
Q

Motor/Sensory/Both?

A

Motor - Somatic

CN XI (Spinal Accessory)

64
Q

Source?

A

Superior spinal cord

CN XI (Spinal Accessory)

65
Q

Skull Foramen?

A

Jugular foramen

CN XI (Spinal Accessory)

66
Q

Innervates?

A
  • Trapezius
  • Sternocleidomastoid

CN XI (Spinal Accessory)

67
Q

Motor/Sensory/Both

A

Motor - Somatic

CN XI (Spinal Accessory)

68
Q

Source?

A

Medulla

CN XI (Spinal Accessory)

69
Q

Skull foramen?

A

Hypoglossal Canal

CN XI (Spinal Accessory)

70
Q

Innervates?

A

Intrinsic and extrinsic muscles of tongue
(not palatoglossus)

CN XI (Spinal Accessory)

71
Q

What is this structure?

A

CN XI (Spinal Accessory)

CN XI (Spinal Accessory)

CMM401/501 Unit 3 Cards (5 decks)

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