Cranial Nerve

by **OrjoWan** Thu Aug 11, 2011 1:06 pm

There are 12 pairs of cranial nerves.

Olfactory I
Optic II
Oculomotor III
Trochlear IV
Trigeminal V
Abducens VI
Facial VII
Auditory (vestibulocochlear) VIII
Glossopharyngeal IX
Vagus X
Spinal Accessory XI
Hypoglossal XII

To help memorize each, a mnemonic is often used by students such as . . .

"On Old Olympic Towering Tops A Finn & German Viewed Some Hops"

Cranial Nerve:		Major Functions:
I Olfactory		smell
II Optic		vision
III Oculomotor		eyelid and eyeball movement
IV Trochlear		innervates superior oblique turns eye downward and laterally
V Trigeminal		chewing face & mouth touch & pain
VI Abducens		turns eye laterally
VII Facial		controls most facial expressions secretion of tears & saliva taste
VIII Vestibulocochlear (auditory)		hearing equillibrium sensation
IX Glossopharyngeal		taste senses carotid blood pressure
X Vagus		senses aortic blood pressure slows heart rate stimulates digestive organs taste
XI Spinal Accessory		controls trapezius & sternocleidomastoid controls swallowing movements
XII Hypoglossal		controls tongue movements

Thanks