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HEAD + NECK ANATOMY > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

the nervous system is broken into 2 parts:

A
  1. CNS

2. PNS

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2
Q

The PNS is broken into 2 parts:

A
  1. afferent

2. afferent

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3
Q

the PNS afferent pathway is broken into 2 parts:

A
  1. somatic

2. visceral

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4
Q

the PNS efferent pathway is broken into 2 parts:

A
  1. somatic

2. visceral

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5
Q

the PNS efferent visceral pathway is broken into 2 parts:

A
  1. parasympathetic

2. sympathetic

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6
Q

what are the 5 nerve fibers and what are they responsible for innervating?

A
  1. GA- conscious sensation
  2. VA- unconscious sensation
  3. SA- special senses
  4. GE- striated muscle
  5. VE- smooth muscle
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7
Q

(name and fiber): CN I:

A

OLFACTORY (SA)

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8
Q

(name and fiber): CN II:

A

OPTIC (SA)

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9
Q

(name and fiber): CN III:

A

OCULOMOTOR (GEVE)

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10
Q

(name and fiber): CN IV:

A

TROCHLEAR (GE)

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11
Q

(name and fiber): CN V:

A

TRIGEMINAL (GEGA)

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12
Q

(name and fiber): CN VI:

A

ABDUCENS (GE)

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13
Q

(name and fiber): CN VII:

A

FACIAL (GEVESA)

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14
Q

(name and fiber): CN VIII:

A

VESTIBULOCOCHLEAR (SA)

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15
Q

(name and fiber): CN IX:

A

GLOSSOPHARYNGEAL (GAVAVE)

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16
Q

(name and fiber): CN X:

A

VAGUS (GEVE)

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17
Q

(name and fiber): CN XI:

A

SPINAL ACCESSORY (GE)

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18
Q

(name and fiber): CN XII:

A

HYPOGLOSSAL (GE)

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19
Q

mnemonic for all 12 CN:

A
  1. OSA
  2. OSA
  3. OGEVE
  4. TGE
  5. TGEGA
  6. AGE
  7. FGEVESA
  8. VSA
  9. GGAVAVE
  10. VGEVE
  11. SGE
  12. HGE
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20
Q

where does CN I exit the cranial cavity?

A

cribriform plate of the ethmoid bone

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21
Q

where does CN II exit the cranial cavity?

A

optic

22
Q

where does CN III exit the cranial cavity?

A

SOF

23
Q

where do CN III’s nuclei originate?

A

midbrain at the level of superior colliculi

24
Q

where does CN IV exit the cranial cavity?

A

SOF

25
Q

where do CN IV exit the nuclei originate?

A

dorsal midbrain at the level of inferior colliculi

26
Q

where does CN IV nuclei exit?

A

dorsal midbrain (crosses over completely)

27
Q

where does CN V exit the cranial cavity?

A

V1: SOF
V2: foramen rotundem
V3: foramen ovale

28
Q

CN V has two types of nuclei - what are they and where are they located?

A

sensory nucleus: spans the length of the brain stem

motor nucleus: pons

29
Q

CN V nuclei exit where?

A

the brainstem at the lateral aspect of the pons

30
Q

where does CN VI exit the cranial cavity?

A

SOF

31
Q

CN VI nucleus is located where?

A

dorsal pons

32
Q

where does the CN VI nucleus exit?

A

brainstem at the pontomedullary junction

33
Q

where does CN VII exit the cranial cavity?

A

internal acoustic meatus

34
Q

where does CN VII travel

A

travels within facial canale of the petrous part of the temporal bone

35
Q

where are CN VII nuclei located

A

multiple nuclei located in the caudal pons

36
Q

where do CN VII nuclei exit?

A

brainstem at the pontomedullary junction (lateral to CN VI)

37
Q

where does CN VIII exit the cranial cavity?

A

internal acoustic meatus

38
Q

where does CN VIII stay?

A

within the petrous part of the temporal bone (does NOT leave skull)

39
Q

where are CN VIII nuclei located?

A

caudal pons and superior medulla

40
Q

where do CN VIII nuclei exit?

A

brainstem at the pontomedullary junction (inferior to CN VII)

41
Q

where does CN IX exit the cranial cavity?

A

jugular foramen

42
Q

where does the CN IX nucleus exit the brainstem?

A

lateral aspect of the rostral medulla

43
Q

where does CN X exit the cranial cavity?

A

jugular foramen (with CN IX)

44
Q

where does the CN X nucleus exit?

A

brainstem inferior to CN IX in the upper medulla

45
Q

where does CN XI exit the cranial cavity?

A

jugular foramen (CN IX and X)

46
Q

where does CN XI enter the skull?

A

foramen magnum

47
Q

T/F: originates only originates within the skull

A

F: CN XI originates both within the cranium and outside of the skull in the upper spinal cord (C1-C5)

48
Q

where does CN XII exit the cranial cavity?

A

hypoglossal canal and occipital bone

49
Q

where does the CN XII nucleus exit?

A

brainstem on the lateral aspect of the medulla

50
Q

how many nuclei does CN III have?

A
  1. oculomotor nucleus (GE)

2. Edinger -Westphal accessory nucleus (VE)

51
Q

CN III nuclei leave the midbrain and travel laterally to what artery?

A

posterior communicating artery

52
Q

T/F: CNIII nuclei travel through the body of the cavernous sinus

A

F: CNIII nuclei travel through the wall of the cavernous sinus

HEAD + NECK ANATOMY (8 decks)

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