Unit 2 cranial nerves name, action, innervations

olfactory nerve action

sense of smell

optic nerve action

vision

optic nerve innervates

eye (retina)

oculomotor nerve action

rotates eye and moves eye superiorly, medially, inferiorly

oculomotor nerve innervation

inferior, medial, superior rectus, inferior oblique

trochlear nerve action

abduct and depress eye

trochlear nerve innervates

superior oblique muscle

trigeminal nerve (ophthalmic) V1 action

general sensory in forehead region

trigeminal nerve (maxillary) V2 action

general sensory below eyes

trigeminal nerve mandibular V3 action

sensory: jaw and tongue

Motor: mastication

trigeminal nerve mandibular V3 innervates

muscles of mastication

abducens nerve action

move eye laterally

abducens nerve innervation

lateral rectus muscle

facial nerve innervates

muscles of facial expression and anterior 2/3 of tongue

facial nerve action

facial expression

vestibulocochlear nerve action

hearing (cochlear branch) and balance (vestibular branch)

vestibulocochlear nerve innervates

inner ear

glossopharyngeal nerve action

sensory: posterior 1/3 tongue

motor: swallow, salvation, gag, blood pressure, respiration

vagus nerve action

swallowing roles in cardiac, pulmonary, digestive, urinary, speech

vagus nerve innervates

palatoglossus

accessory nerve action

movement of head and shoulders

accessory nerve innervates

trapezius and sternocleidomastoid

Hypoglossal nerve action

tongue movement

Hypoglossal nerve innervates

genioglossus, hyoglossus, styloglossus muscles

CN I

Olfactory

CN II

Optic

CN III

Oculomotor

CN IV

trochlear nerve

CN V

Trigeminal

CN VI

abducens nerve

CN VII

facial nerve

CN VIII

Vestibulocochlear

CN IX

glossopharyngeal nerve

CN X

Vagus

CN XI

accessory

CN XII

Hypoglossal

sensory CN

I, II, VIII

motor CN

III, IV, VI, XI, XII

mixed CN

V, VII, IX, X