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Table 1

NERVE TYPE CHIEF FUNCTIONS
I OLFACTORY sensory smell (olfaction)
II OPTIC sensory vision
III OCULOMOTOR motor rotates the eye inward toward the nose (adduction), moves the eye downward (depression), upward (elevation), rotates the eye upward and outward toward the temples (extorsion), also controls lifting of the eyelids, is responsible for the accommodation response, and parasympathetic constriction of the pupil
IV TROCHLEAR motor rotation of the eyes downward and inward toward the nose (intorsion)
V TRIGEMINAL mixed
(both)		 motor:  movements of jaw and muscles of mastication 
sensory:   input from the head (skin of face and scalp), cornea of the eye, the teeth, and the dura mater 
VI ABDUCENS motor rotates the eye outward toward the temple (abduction)
VII FACIAL mixed
(both)		 motor: facial expression, salivation, secretion of tears, parasympathetic innervation of the cerebral vasculature
sensory: taste from anterior two-thirds of tongue, sensations from skin of the external ear canal
VIII AUDITORY
(VESTIBULO-
COCHLEAR)		 sensory equilibrium and audition
IX GLOSSOPHARYNGEAL mixed
(both)		 motor: salivation, elevation of the pharynx, swallowing sensory: taste from posterior third of the tongue, sensations     from other mouth and throat areas
X VAGUS mixed
(both)		 sensory and motor from and to the heart, stomach, blood vessels,  larynx and pharynx, among others
XI SPINAL ACCESSORY motor movements of the head, shoulders
XII HYPOGLOSSAL motor movements of tongue
Mnemonics
On Olfactory Some Sensory
Old Optic Say Sensory
Olympus Oculomotor Marry Motor
Towering Trochlear Money Motor
Top Trigeminal But Both (sensory/motor)
A Abducens My Motor
Finn Facial Brother Both (sensory/motor)
And Auditory Says Sensory
German Glossopharyngeal Bad Both (sensory/motor)
Vend Vagus Business Both (sensory/motor)
Some Spinal accessory Marrying for Motor
Hops Hypoglossal Money Motor


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