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Flashcards in Cranial nerve notes Deck (10):
1

How to remember functions of CN

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

2

Special sensory cranial nerves

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

3

Somatic motor cranial nerves

*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

4

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

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

5

What does general visceral motor aka general visceral efferent refer to

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

6

What muscles does gill arch nerve V innervate?

Masseter
temporalis
Pterygoids
Mylohyoid
Anterior belly of digastric
Tensor tympani
Tensor palati

7

What muscles does gill arch nerve VII innervate?

muscles of facial expression
stylohyoid
posterior belly of digastric
Stapedius

8

What muscles does gill arch nerve IX innervate?

Stylopharyngeus

9

What muscles does gill arch nerve X innervate?

palatoglossus
palatopharyngeus
levator palati
pharyngeal constrictors
laryngeal mm

10

What muscles does gill arch nerve XI innervate?

sternocleidomastoid
trapezius