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Cranial Nerves
cranial nerves of the peripheal nervous system
12
Anatomy
Undergraduate 1
11/23/2009

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Term
Olfactory?
Definition
# I. purely sensory. Fibers arise from olfactory epithelium and run through cribriform plate of ethmoid bone to synapse in olfactory bulbs.
Term
Optic?
Definition
# II. Purely sensory. Fibers arise from retina of eye to form the optic nerve and pass through optic canal of orbit.
Term
Oculomotor?
Definition
III. Primarily motor. Fibers emerge from dorsal midbrain and course ventrally to enter the orbit.
Term
Trochlear?
Definition
IV. Primarily motor. Fibers emerge from midbrain and exit from skull via superior orbital fissure
Term
Trigeminal?
Definition
V. Mixed. Fibers emerge from pons and form three divisions, which exit seperately from skull
Term
Abducens?
Definition
VII. Carries motor fibers to lateral rectus muscle of the eye
Term
Facial?
Definition
VII. Mixed. Fibers leave pons and travel through temporal bone
Term
Vestibulocochlear?
Definition
VIII. Purely sensory. Fibers run from inner ear equilibrium and hearing apparatus
Term
Glossopharyngeal?
Definition
IX. Mixed. Fibers emerge from medulla and leave skull via jugular foramen to run to throat
Term
Vagus?
Definition
X. Mixed. Runs to abdominal cavity
Term
Accessory?
Definition
XI. Mixed. Fibers arise from medulla and superior aspect of spinal cord
Term
Hypoglossal?
Definition
XII. Mixed. Fibers arise from medulla and exit from skull via hypoglossal can to travel to tongue
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