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Anatomy (Neck and Head) > Cranial Nerve Overview (11.15.2017) > Flashcards

Cranial Nerve Overview (11.15.2017) Flashcards

1
Q

What is CN I?

A

Olfactory

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2
Q

What is CN II?

A

Optic

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3
Q

What is CN III?

A

Oculomotor

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4
Q

What is CN IV?

A

Trochlear

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5
Q

What is CN V?

A

Trigeminal

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6
Q

What is CN VI?

A

Abducent

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7
Q

What is CN VII?

A

Facial

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8
Q

What is CN VIII?

A

Vestibulocochlear

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9
Q

What is CN IX?

A

Glossopharyngeal

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10
Q

What is CN X?

A

Vagus

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11
Q

What is CN XI?

A

Accessory

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12
Q

What is CN XII?

A

Hypoglossal

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13
Q

Where does the Olfactory (CN I) exit the cranium?

A

Cribriform plate

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14
Q

Olfactory nerve target?

A

Olfactory nerves

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15
Q

Optic nerve (CN II) cranial exit?

A

Optic canal

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16
Q

Optic nerve target?

A

Retina/eye

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17
Q

Oculomotor nerve (CN III) fiber type?

A
  • Motor

- Parasympathetic

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18
Q

Oculomotor nerve (CN III) cranial exit?

A

Superior orbital fissure

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19
Q

Oculomotor target?

A
  • Levator palpebrae superioris muscle

- 4 extraocular muscles

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20
Q

Oculomotor nerve parasympathetic innervation targets?

A
  • Ciliary muscle

- Sphincter pupillae muscle

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21
Q

Trochlear nerve (CN IV) fiber type?

A

motor

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22
Q

Trochlear nerve (CN IV) cranial exit?

A

Superior orbital fissure

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23
Q

Trochlear nerve target?

A

Superior oblique muscle (helps you look down and in)

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24
Q

What are the 3 divisions of the Trigeminal (CN V)?

A
  1. Opthalmic Division (CN V1)
  2. Maxillary Division (CN V2)
  3. Mandibular Division (CN V3)
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25
Q

What is the fiber type of CN V1 (opthalmic)

A

somatic sensory

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26
Q

What is the cranial exit of CN V1 (opthalmic)

A

Superior orbital fissure

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27
Q

Target of CN V1?

A
  • Skin of scalp, forehead, upper eyelid
  • Cornea
  • Anterior nasal cavity
  • Frontal and ethmoid sinuses
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28
Q

What is the fiber type of CN V2 (maxillary)?

A

Somatic sensory

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29
Q

What is the cranial exit for CN V2 (maxillary)?

A

foramen rotundum

30
Q

What are the targets of CN V2?

A
  • Skin of face and scalp, lower eyelid, upper lip
  • Maxillary teeth and gingivae
  • Maxillary sinuses
  • Mucosa of posterior nasal cavity
  • Hard and soft palates
31
Q

What is/are the fiber type(s) of CN V3 (mandibular)?

A
  • Motor

- Somatic sensory

32
Q

What is the cranial exit for CN V3?

A

Foramen ovale

33
Q

What are the (4) sensory targets of CN V3?

A

Somatic sensory to:

  • Skin of scalp and skin of face, cheek and lower lip
  • External tympanic membrane
  • Mandibular teeth and gingivae
  • Anterior 2/3rds of tongue
34
Q

What are the (5) muscle targets of CN V3?

A

Somatic motor:

  • muscles of mastication (temporalis, masseter, medial pterygoid, lateral pterygoid)
  • anterior belly of digastric
  • Mylohyoid
  • Tensor veli palatini (tenses soft palate)
  • Tensor tympani muscles (tenses the ear drum to dampen sound)
35
Q

Fiber type in cranial nerve VI (abducent)?

A

Motor

36
Q

What is the cranial exit of CN VI (abducent)?

A

superior orbital fissure

37
Q

Target of cranial nerve VI (abducent)?

A

lateral rectus muscle (abducts the eyeball)

38
Q

Fiber type of cranial nerve VII (Facial)?

A
  • Somatic motor
  • Special sensory
  • Parasympathetic

*sympathetic (sympathetic fibers from the deep petrosal nerve travel with facial nerve)

39
Q

Where does cranial nerve VII (facial) exit the cranium?

A

Stylomastoid foramen

40
Q

What is the general pathway of Facial nerve (CN VII)?

A 
Internal acoustic meatus, facial canal
   1.Chorda tympania
   2. Branch to stapedius muscle
   3. Greater petrosal
Exits facial canal via stylomastoid foramen, travels inferiorly
41
Q

What are the main targets of Cranial nerve VII?

A
  • Somatic motor to stapedius
  • Muscles of facial expression
  • Stylohyoid muscle
  • Posterior belly of digastric muscle
42
Q

Which nerve does Chorda tympani hitchhike with?

A

hitchhikes with lingual nerve (branch of CN V3)

43
Q

What are the targets of Chorda tympani?

A 
Special sensory (taste):
anterior 2/3 of the tongue

Parasympathetic:
submandibular and sublingual glands

44
Q

Where does the greater petrosal portion of Facial nerve VII exit the cranium?

A

Exits temporal bone

45
Q

What is the Chorda tympani pathway?

A

Middle ear, hitchhike on lingual nerve (CN V3), anterior and posterior to targets OR submandibular ganglion (synapse), oral cavity

46
Q

What is the Greater Petrosal pathway?

A

Exit temporal bone

  • joins with deep petrosal nerves (carries sympathetic fibers)
  • pterygoid canal
  • pterygopalatine ganglion (synapese)
  • Hitchhike on CN V2
  • Travels anteriorly
47
Q

What are the targets of the greater petrosal nerve?

A

Parasympathetic and sympathetic:

  1. Lacrimal gland
  2. Nasal mucosa
48
Q

What is the fiber type of Vestibulocochlear CN VIII?

A

Special sensory

49
Q

Where does CN VIII exit the cranium?

A

Internal acoustic meatus

50
Q

What are the targets of CN VIII?

A
  1. Cochlea

2. Semicircular canals

51
Q

What fiber types are contained in CN IX Glossopharyngeal?

A
  • Somatic Sensory
  • Visceral sensory
  • Special Sensory
  • Somatic Motor
  • Parasympathetic (visceral motor)
52
Q

Where does CN IX exit the cranium?

A

Jugular foramen

53
Q

What are the somatic motor and visceral sensory targets of CN IX?

A

Somatic motor:
-stylopharyngeus muscle

Visceral sensory:
-carotid body and sinus

54
Q

What are the somatic sensory targets of CN IX?

A

Somatic sensory:

  1. oropharynx
  2. Soft palate
  3. Posterior 1/3 of tongue
55
Q

What is the special sensory targets of CN IX?

A

Taste: Posterior 1/3 of tongue

56
Q

What are the targets of the tympanic nerve (CN IX)?

A

Somatic sensory: internal surface of tympanic membrane

57
Q

What is the target of the Lesser Petrosal Nerve (CN IX)?

A

Parasympathetic to parotid gland

58
Q

What types of fibers are in CN X (vagus)?

A
  1. Motor
  2. Somatic Sensory
  3. Special Sensory
59
Q

Where does the vagus nerve exit the cranium?

A

Jugular foramen

60
Q

What are the targets of the Pharyngeal branch of the Vagus nerve?

A

Somatic motor:

  1. pharyngeal constrictors
  2. levator veli palatini muscles
  3. palatoglossus muscles
  4. palatopharyngeus muscles
  5. esophagus
61
Q

What does the pharyngeal branch of the vagus nerve supply special sensory to?

A

epiglottis

62
Q

What is the somatic motor target of the superior laryngeal branch of vagus nerve?

A

somatic motor:

cricothyroid muscle

63
Q

What does the superior laryngeal branch of CN X supply somatic sensory to?

A

Laryngeal mucosa superior to vocal folds

64
Q

What is the somatic motor target of the inferior laryngeal branch of CN X?

A

somatic motor to intrinsic muscles of larynx

65
Q

What does the inferior laryngeal branch of CN X supply somatic sensory to?

A

somatic sensory to laryngeal mucosa inferior to vocal folds

66
Q

What type of fiber does CN XI have?

A

motor

67
Q

Where does CN XI exit the cranium?

A

Jugular foramen

68
Q

What are the targets of CN XI?

A
  1. sternocleidomastoid

2. Trapezius

69
Q

What type of fiber does CN II have?

A

Hypoglossal has motor fibers

70
Q

Where does CN XII exit the cranium?

A

Hypoglossal canal

71
Q

What are the targets of CNII?

A

Intrinsic and most extrinsic muscles of the tongue.

Anatomy (Neck and Head) (8 decks)

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