Cranial Nerves BIOL 319 TAMU

I

olfactory

II

optic

III

oculomotor

IV

trochlear

V

trigeminal

VI

abducens

VII

facial

VIII

vestibulocochlear

IX

glossopharyngeal

X

vagus

XI

accessory

XII

hypoglossal

olfactory nerve

sense of smell; cruciform plate; sensory; afferent

optic nerve

special sense of vision; optic canal; sensory; afferent

oculomotor nerve

moves eye muscles and upper eyelid; parasympathetic to move smooth muscle in the eye; superior orbital fissure; motor; efferent

trochlear nerve

moves one of the 6 eye muscles; superior orbital fissure; motor; efferent

trigeminal nerve

controls muscles used in chewing, a middle ear muscle, a palatine muscle and 2 throat muscles; sensory for the face; proprioception of the tongue and cheek; superior orbital fissure, foramen rotunda, and foramen ovale; sensory, motor; afferent, efferent

abducens nerve

moves one of the 6 eye muscles; superior orbital fissure; motor; efferent

facial nerve

moves all muscles of facial expression, a smooth muscle in the middle ear, and 2 hyoid muscles; sensory for taste in anterior 2/3 of tongue; internal auditory canal and stylomastoid foramen; sensory, motor; afferent, efferent

vestibulocochlear nerve

special senses of hearing and balance; internal auditory canal; sensory; afferent

glossopharyngeal nerve

moves muscle of the pharynx; sensory for taste in posterior 1/3 of tongue; conveys sensory information from receptors in carotid arteries; jugular foramen; sensory, motor; afferent, efferent

vagus nerve

innervates muscles in soft palate, pharynx, and larynx; sensory for taste from root of tongue, pharynx, and larynx; conveys sensory information from thoracic and abdominal organs; jugular foramen; sensory, motor; afferent, efferent

accessory nerve

moves sternocleidomastoid and trapezius; jugular foramen and foramen magnum; motor; efferent

hypoglossal nerve

moves tongue and throat muscles; hypoglossal canal; motor; efferent

Clinical Condition of Cranial Nerve I

anosmia

Clinical Condition of Cranial Nerve II

blindness

Clinical Condition of Cranial Nerve III

Ptosis, inability to contract the muscle, eyelid droops, blurry vision in affected eye

Clinical Condition of Cranial Nerve IV

double vision

Clinical Condition of Cranial Nerve V

trigeminal neuralgia

Clinical Condition of Cranial Nerve VI

cross eyed

Clinical Condition of Cranial Nerve VII

palsy; inability to taste at anterior tongue

Clinical Condition of Cranial Nerve VIII

loss of hearing; loss of balance or equilibrium, nausea

Clinical Condition of Cranial Nerve IX

loss of taste at posterior tongue; difficulty swallowing; decreased salivation

Clinical Condition of Cranial Nerve X

difficulty swallowing; hoarseness

Clinical Condition of Cranial Nerve XI

difficulty rotating neck or elevating scapula

Clinical Condition of Cranial Nerve XII

difficulty/loss of speech; loss of tongue mobility