KAAP 309 Cranial Nerves

CN I name

olfactory

CN I - sensory, motor, or both?

special sensory - smell

CN I - enter/exit skull through?

originate in mucosal lining of nose, enter skull through cribiform plate

CN II name

optic

CN II - sensory, motor, or both?

special sensory - vision

CN II - enter/exit skull through?

enter skill through optic canal

CN III name

occulomotor

CN III - sensory, motor, or both?

Motor - innervation to medial rectus, superior rectus, inferior rectus, and inferior oblique

CN III - enters/exits skull through?

Exits skull through superior orbital fissure

CN IV name

trochlear

CN IV - sensory, motor, or both?

motor - innervation to superior oblique muscle

CN IV - enters/exits skull through?

exits skull through superior orbital fissure

CN V name

trigeminal nerve

three subdivisions

V1 name

opthalmic

V1 - sensory, motor, or both?

sensory - forehead, nose, external surface of eyeball

V1 - enter/exit skull through?

enter skull through superior orbital fissure

V2 name

maxillary

V2 - sensory, motor, or both?

sensory - temples, cheeks, upper lip, and maxillary teeth

V2 - enter/exit skull through?

enter skull through foramen rotundum

V3 name

mandibular

V3 - sensory, motor, or both?

both (sensory - jaw line, lower lip, tongue, mandibular teeth; motor - muscles of mastification)

V3 - enter/exit skull through?

enter and exit through foramen ovale

CN VI name

abducens

CN VI - sensory, motor, or both?

motor - lateral rectus muscle

CN VI - enters/exits skull through?

exits skull through superior orbital fissure

CN VII name

facial

CN VII - sensory, motor, or both?

both (motor - muscles of facial expression, innervation of salivary glands; special sensory - taste)

CN VII - enters/exits skull through?

enters skull through internal acoustic meatus

CN VII - 5 distinct branches

temporal, zygomatic, buccal, mandibular, cervical

CN VIII name

Vestibulocochlear

CN VIII - sensory, motor, or both?

Special sensory - hearing and balance

CN VIII - enters/exits skull through?

enters skull through internal acoustic meatus

CN IX name

Glossopharyngeal

CN IX - motor, sensory, or both?

Both (motor - stylopharyngeaus muscle; special sensory - taste; sensory to tongue)

CN IX - enters/exits skull through?

enters and exits skull through jugular foramen

CN X name

vagus

CN X - sensory, motor, or both?

Both (motor - muscles of palate and pharynx; special sense - taste to epiglottis; sensory to ear and throat)

CN X - enters/exits skull through?

jugular foramen

CN XI name

accessory

CN XI - sensory, motor, or both?

motor - trapezius and sternocleidomastoid muscles

CN XI - enters/exits skull through?

Enters skull through foramen magnum

Exits skull through jugular foramen

CN XII name

hypoglossal

CN XII - sensory, motor, or both?

Motor - muscles of tongue

CN XII - enters/exits skull through?

hypoglossal canal