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HFF - Exam 3 > Cranial Nerves - Hutch > Flashcards

Cranial Nerves - Hutch Flashcards

1
Q

Talking about the brain proper, not the stem. What is caudal, rostral, dorsal, and ventral?

A

Caudal - Posterior
Rostral - Anterior
Dorsal - Superior
Ventral - Inferior

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2
Q

Speaking about the spinal cord, what is rostral, caudal, ventral, and dorsal?

A

Rostral - Superior
Caudal - Inferior
Ventral - Anterior
Dorsal - Posterior

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3
Q

What is the cranial nerve mnemonic you know?

A

SSMMBMBSBBMM
OOOTTAFVGVAH
O
M
M
Crib, Optic, SOF, SOF, SOF, SOF, IAM, IAM, JUG, JUG, JUG (mag), Hypo
Round
Oval

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4
Q

What are general somatic afferents?

A

Somatic sensation from skin and striated muscle (Temp, touch, general body sensations)

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5
Q

What are general visceral afferents?

A

Visceral sensation - deep organs (viscera and blood vessels)

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6
Q

What are general visceral efferents?

A

Visceromotor - Smooth muscle of the viscera, heart, salivary glands, etc.

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7
Q

What are general somatic efferents?

A

Somatomotor function - Motor to striated muscles

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8
Q

What are special somatic afferents?

A

Impulses from retina, auditory, and vestibular apparatuses

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9
Q

What are special visceral afferents?

A

Impulses from taste buds and olfactory mucosa

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10
Q

What are special visceral efferents?

A

Branchial motor - innervate striated muscles from branchial arches

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11
Q

CN I is part of the what? (Developmentally)

A

Telencephalon

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12
Q

CN II is part of what? (Developmentally)

A

Diencephalon

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13
Q

What happens at the optic chiasm?

A

Some optic fibers cross, and others do not.

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14
Q

Where does CN I exit the skull?

A

Cribiform foramina

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15
Q

Where does CN II leave the skull?

A

Optic canal

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16
Q

CN III, IV, and VI can be lumped together as what?

A

Nn. that control ocular muscles.

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17
Q

CN III is what nerve?

A

Oculomotor

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18
Q

CN III controls what muscles?

A

All ocular except lat rectus and sup oblique

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19
Q

CN IV is what nerve?

A

Trochlear n.

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20
Q

What does CN IV control?

A

Motor to sup oblique

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21
Q

What is special about CN IV?

A

Only CN that emerges dorsally. All others are ventral

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22
Q

What is CN VI?

A

Abducens n.

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23
Q

What does CN VI control?

A

Motor to lat rectus

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24
Q

List the muscles that CN III is somatic motor to.

A 
Sup rectus
Inf rectus
Med rectus
Inf oblique
Levator palpebrae superioris
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25
Q

List the muscles that CN III is visceral motor to.

A

Pupillary sphincter

Ciliary m.

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26
Q

Where does CN III exit the skull?

A

SOF

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27
Q

What does CN IV somatic motor control?

A

Sup oblique

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28
Q

What is special about CN IV’s nuclei?

A

They sit contralaterally while all the other CN’s sit ipsilaterally

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29
Q

The lateral rectus muscle does what and what innervates it?

A

Abducts the eyeball

CN VI

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30
Q

CN V is what nerve?

A

Trigeminal

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31
Q

What are the 3 main branches off of CN V?

A

V1 - Opthalamic
V2 - Maxillary
V3 - Mandibular

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32
Q

CN V as a whole innervates what?

A 
Muscles of mastication
Oral floor muscles
Tensor tympani (mid ear)
Tensor veli palatini (pharyngeal)
Sensation of the face, forehead, tongue
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33
Q

Most of the cranial dura mater is innervated (sensory) by what?

A

Opthalamic n.

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34
Q

The nasal mucosa is sensory innervated by what?

A

Maxillary

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35
Q

The ant 2/3 of tongue (sensory) is innervated by what?

A

Mandibular

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36
Q

What are the main muscles of mastication? (4)

A

Temporalis
Masseter
Med pterygoid
Lat pterygoid

37
Q

V1 exits the skull where?

A

SOF

38
Q

V1 is what to the lacrimal gland?

A

Sensory only

39
Q

What is visceral motor to lacrimal gland?

A

Facial

40
Q

What branches off V1? (4) TNFL

A

Tentorial n.
Nasociliary n.
Frontal n.
Lacrimal n.

41
Q

V2 exits the skull where?

A

Foramen rotundum and then thru the pterygopalatine fossa

42
Q

What branches off V2 from sup to inf? 3SAZI

A 
Zygomatic n.
Infraorbital n.
Ant sup alveolar n.
Middle sup alveolar n.
Post sup alveolar n.
43
Q

What is special about the zygomatic nerve?

A

This is where VII hitch-hikes - greater pertrosal n.

44
Q

V3 exits the skull where?

A

Foramen ovale

45
Q

What branches off V3? (7) BADMILP

A 
Auriculotemporal n.
Buccal n.
Masseteric branches
Deep temporal branch
Pterygoid branches
Inf alveolar n. (branches into mental n.)
Lingual n.
46
Q

The lingual n. runs where?

A

Medial to the mandible

47
Q

The lingual n. does what?

A

General sensory of mucosa 2/3 tongue and floor of mouth

48
Q

What runs with lingual nerve?

A

Chorda tympani - branch of CN VII - Taste sensation ant 2/3 of tongue

**Also innervates submand, sublingual, and smaller glands

49
Q

The inferior alveolar n. enters what?

A

Mandibular foramen

50
Q

What is V3 motor to?

A

Mylohyoid

Ant belly of digastric

51
Q

What is V3 sensory to?

A

Pulp of teeth

Mental n. - skin and lip

52
Q

What is CN VII?

A

Facial nerve

53
Q

Where does CN VII exit the skull?

A

IAM

54
Q

What other CN exits IAM?

A

CN VIII

55
Q

When does VII start to branch?

A

After it goes thru stylomastoid foramen

56
Q

What are the 5 branches and 3 other branches of CN VII? TZBMC - PPS

A 
Temporal
Zygomatic
Buccal
Mandibular
Cervical

(Do the hand thing on face, thumb is temporal)

Post auricular n.
Post digastric m.
Stylohyoid m.

57
Q

What is motor to Anterior digastric?

A

CN V

58
Q

What innervates facial skin sensation?

A

CN V

59
Q

What does sensation from lacrimal gland?

A

CN V

60
Q

What nerve is a branch of CN VII that is motor to lacrimal and nasal glands, and what does it hitchhike with?

A

Greater petrosal n.

V2 (Zygomatic)

61
Q

What branch of the CN VII innervates submandibular and sublingual glands and does taste to ant 2/3 of tongue and what does it hitchhike with?

A

Chorda tympani n.

V3 (Lingual n.)

62
Q

What does the chorda tympani n. run thru?

A

Petrotympanic fissure

63
Q

What branch of CN VII innervates the stapedius m.?

A

Nerve to stapedius

64
Q

Branches that innervate stylohyoid and post belly of digastric come from what CN?

A

CN VII

65
Q

The facial nerve innervates all glands except for what large one?

A

Parotid gland - the one it runs thru

66
Q

In summary, CN VII is motor to what?

Innervates all but what gland?

Is notorious for doing what to other nerves?

A

Muscles of expression
Parotid
Hitchhiking

67
Q

What is CN VIII?

A

Vestibulocochlear n.

68
Q

What does the CN VIII do?

A

Vestibular senses

Sense of hearing

69
Q

Where does CN VIII exit the skull?

A

IAM

70
Q

CN IX is what?

A

Glossopharyngeal n.

71
Q

Where does IX exit the skull?

A

Jugular foramen

72
Q

CN IX does a lot. Tell me the motor functions. (3 things)

A

Pharyngeal constrictors
Stylopharyngeus
Parotid gland

73
Q

CN IX does a lot. Tell me the sensory functions. (5 things)

A 
Post tongue
Post oral pharynx
Mucosa of middle ear
Skin of external ear and canal
Tympanic membrane
74
Q

CN IX does a lot. Tell me the special sensory functions. (2)

A

Taste to post 1/3 of tongue

Chemo and baroreceptors to carotid sinus

75
Q

The lesser petrosal n. hitchhikes w/ what n. to get to the parotid gland?

A

Auriculotemporal n. (Branch of V3)

76
Q

CN X is what nerve?

A

VAGUS

77
Q

CN X is sensory to what? (5)

A 
Viscera in abdomen and thorax
Laryngopharynx and larynx
Taste - epiglottis
Ear and ext acoustic meatus
Dura of post cranial fossa
78
Q

CN X is motor to what?

A 
Pharyngeal constrictors (also CN IX)
Laryngeal muscles
79
Q

What are 2 special senses of CN X?

A

Pressure receptors - aortic arch

Chemoreceptors - aortic body

80
Q

CN XI is what?

A

Spinal accessory n.

81
Q

What two muscles does CN XI innervate?

A

Trapezius

SCM

82
Q

What fascial layer are the trapezius and SCM in?

A

Investing fascia

83
Q

What is unique about CN XI?

A

It ascends cord and enters into the skull via foramen magnum. It then exits the skull with CN X via the jugular foramen.

84
Q

What exits out of the skull via the jugular foramen?

A

CNs IX, X, XI

85
Q

What is CN XII?

A

Hypoglossal n.

86
Q

What does CN XII do?

A

Motor to tongue muscles

87
Q

Where does CN XII exit the skull?

A

Hypoglossal canal

88
Q

CN VII saying?

A

Closes your eye - CN VII proper - IAM thru stylomastoid foramen - Branches TZBMC

Tastes pie (special taste sense ant 2/3) - Chorda tympani - IAM thru petrotympanic fissure

Makes you cry - Greater petrosal nerve - IAM thru base of skull - hitchhikes with V1 and V2 to get to lacrimal gland

Innervates all glands, except for the one it goes thru, the parotid gland

HFF - Exam 3 (19 decks)

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