2026 neuro exam 3 lil study guide

what is the main function of CN 1: olfactory nerve?

smell

what is the main function of CN 2: optic nerve?

vision

what is the main function of CN 3: oculomotor nerve?

eye mvmt + pupil constriction

what is the main function of CN 4: trochlear nerve?

moves eyes downward + inward

what is the main function of CN 5: trigeminal nerve?

facial sensation and mms of mastication

what is the main function of CN 6: abducens nerve?

abducts eye (moves eyes laterally)

what is the main function of CN 7: facial nerve?

facial expression + taste to 2/3 of anterior tongue

what is the main function of CN 8: vestibulocochlear nerve?

hearing and balance

what is the main function of CN 9: glossopharyngeal nerve?

taste to posterior 1/3 of tongue and swallowing

what is the main function of CN 10: vagus nerve?

swallowing, voice, + parasympathetic control of organs

what is the main function of CN 11: accessory nerve?

innervates SCM and traps

shoulder shrug and head rotation

what is the main function of CN 12: hypoglossal nerve?

tongue mvmt