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Cranial Nerves
n/a
21
Anatomy
Undergraduate 3
10/01/2012

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Term
Cranial Nerves emerge from:
Numbered:
What are the functions
Which nerves attach to the forebrain vs brain stem
What structures do they serve?
Definition
emerge from brain and pass thru foramina of skull
Numbered 1-12
both motor and sensory functions- varies
Cranial nerves 1 and 2 attach to forebrain
all others attach to brain stem
Primarily serve neck and head, but vagus nerve extends to abs and innervates visceral organs to proximal colon
Term
Pure sensory nerves:
Definition
1,2,8
Term
Almost purely motor (also carry proprioception)
Definition
3,4,6,7,11,12
Term
Eye muscle motor nerves:
Definition
3,4,6
Term
trapezius and sternocleidomastoid motor nervs:
Definition
11
Term
Tongue muscle motor nerve:
Definition
12
Term
Mixed Nerves-both motor and general sensory components:
Definition
5,7,9,10
Term
Special visceral sensory
Definition
All mixed nerves except 5 carry special visceral sensory input from taste buds
Term
Mixed Nerves of the :
Anterior Tongue-
Posterior Tongue-
Epiglotis
Definition
VII AT
IX PT
X Epiglotis
Term
what is Cranial nerve I?
Definition
olfactory nerve- sensory nerve of smell
Term
what is Cranial nerve II?
Definition
Optic nerve- sensory nerve of vision
Term
what is Cranial nerve III?
Definition
occulomotor nerve- innervates four of the extrinsic eye muscles; move eye
Term
what is Cranial nerve IV?
Definition
Trochlear nerve- innervates one of the extrinsic eye muscles
Term
what is Cranial nerve V?
Definition
Trigeminal nerve- provides sensory innervation to face (general somatic sensory)
Motor innervation ot chewing muscles
3 divisions: ophthalamic, maxillary, mandibular
Term
what is Cranial nerve VI?
Definition
abducens nerve- abducts the eyeball
Term
what is Cranial nerve VII?
Definition
Facial nerve- innervated muscles of facial expression (motor_
gerneral sesnory afferents; parasympathetic motor
Term
what is Cranial nerve VIII?
Definition
Vestibulocochlear Nerve- sensory nerve of hearing and balance
Term
what is Cranial nerve IX?
Definition
Glossopharyngeal Nerve- innervates tongue and pharynx; taste and general sensory; motor to lift pharynx; parasympathetic to parotid gland
Term
what is Cranial nerve X?
Definition
Vagus nerve- A mixed sensory and motor nerve
"wanders" into thorax and abdomen
Term
what is Cranial nerve XI?
Definition
Accessory Nerve- part of vagus nerve
Term
what is Cranial nerve XII?
Definition
Hypoglossal Nerve- runs inferior to the tongue and innervates tongue muscles
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