Testing Cranial Nerves Functionality

NERVE		FUNCTION	HOW TO TEST
I	Olfactory	olfaction	with an odorous substance
II	Optic	vision	vision chart
III	Oculomotor	most eye muscles	"follow the moving finger"
IV	Trochlear	superior oblique	look down at the nose
V	Trigeminal	facial sensation	touch the face
		muscles of mastication	clench the teeth
VI	Abducens	lateral rectus	look to the side
VII	Facial	facial expression	smile, raise the eyebrows
		taste	sugar or salt
VIII	Vestibulo- cohlear	hearing	a tuning fork
		balance	look for vertigo
IX	Glosso- pharyngeal	pharynx sensation	gag reflex
X	Vagus	muscles of larynx and pharynx, parasymp.	check for hoarseness, open wide and say "AH"
XI	Accessory	trapezius and sternocleidomastoid	test shoulder raise or turning the head
XII	Hypoglossal	tongue muscles	stick out the tongue