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cranial N # and func
brief over view
12
Anatomy
01/14/2009
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Term
CN I



Definition
OLFACTORY N

func

olfaction
Term
CN II



 Definition
OPTIC N

func

vision
Term
CN III




 Definition
OCULOMOTOR N

func

eye movements, pupil constriction
Term
CN IV



 Definition
TROCHLEAR N

func

eye movements
Term
CN V




 Definition
TRIGEMINAL N

func

facial sensation, muscles of mastication, also temp & pain

mastication - biting and grinding of food in mouth

three different roots

1) opthalmic N - CN V1 - carries only sensory fibers
2) maxillary N - CN V2 - sensation from maxilla, nasal cavity, sinuses, and the palate, and the subsequent mid face
3) mandibular N - CN V3 - largest of all the trigeminal N roots large sensory root and small motor root
Term
CN VI




 Definition
ABDUCENS N

func

eye movements
Term
CN VII



 Definition
FACIAL N

func

muscles of facial expression, taste, lacrimation, salivation
Term
CN VIII

 Definition
VESTIBULCOCHLEAR N

func

hearing, equilibrium sense
Term
CN IX




 Definition
GLOSSOPHARYNGEAL N

func

pharyngeal muscles, carotid body reflexes, salivation

pharyngeal muscles - help with swallowing of food
Term
CN X



 Definition
VAGUS N

func

para to most organs, laryngeal muscles ( voice ), pharyngeal muscles, aortic arch reflexes
Term
CN XI




 Definition
SPINAL ACCESSORY N

func


head turning ( trapezius and sternomastoid muscles )


Term
CN XII


 Definition
HYPOGLOSSAL N

func


tongue movement