Cranial nerve notes Flashcards

1
Q

How to remember functions of CN

A
Some-I
Say-II
Marry-III 
Money-IV
But-V
My-VI
Brother-VII
Says-VIII
Big-IX
Boobs-X
Matter-XI
More-XII
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2
Q

Special sensory cranial nerves

A

*Derived from ectoderm structures
Forebrain-olfaction: CN I
Midbrain-vision: CN II
Hindbrain-balance and equilibrium: CN VIII

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3
Q

Somatic motor cranial nerves

A

*From somites of the head. Give rise to extraocular muscles and tongue muscles
CN III-most extraocular (and parasymp. to eye)
CN IV-sup. oblique
CN VI-Lateral rectus
CN XII- all tongue mm that end in glossus except palatoglossus

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4
Q

Why calling calling CN V and XI primitive dorsal roots is a bit of a “fudge”

A

Because parasympathetics coming out of the brain only travel with 3 of the 5 gill arch nerves classified as primitive dorsal roots, VII, IX, and X
NOT V or XI

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5
Q

What does general visceral motor aka general visceral efferent refer to

A

The parasympathetic component of CN III, VII, IX, X

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6
Q

What muscles does gill arch nerve V innervate?

A
Masseter
temporalis
Pterygoids
Mylohyoid
Anterior belly of digastric
Tensor tympani
Tensor palati
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7
Q

What muscles does gill arch nerve VII innervate?

A

muscles of facial expression
stylohyoid
posterior belly of digastric
Stapedius

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8
Q

What muscles does gill arch nerve IX innervate?

A

Stylopharyngeus

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9
Q

What muscles does gill arch nerve X innervate?

A
palatoglossus
palatopharyngeus
levator palati
pharyngeal constrictors
laryngeal mm
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10
Q

What muscles does gill arch nerve XI innervate?

A

sternocleidomastoid

trapezius

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