cranial nerves

CN I

olfactory

CN II

optic

CN III

oculomotor

CN IV

trochlear

CN V

trigeminal

CN VI

Abducens

CN VII

facial

CN VIII

vestibulocochlear

CN IX

glossopharyngeal

CN X

vagus

CN XI

accessory

CN XII

hypoglossal

olfactory

CN I

• sensory

• function is to smell

optic

CN II

• sensory

• function is eye sight

oculomotor

CN III

• motor

• control eye movement, eyelid function, and pupil constriction

trochlear

CN IV

• motor

• control movement of eye muscle

• downward/inward movement

trigeminal

CN V

• sensory and motor

• face sensation and jaw movement

abducens

CN VI

• motor

• move eye inward and outward

Facial

CN VII

• sensory and motor

• taste in rostral (front) portion of tongue

• motor to face

vestibulocochlear

CN VIII

• sensory

• hearing and balance

glossopharyngeal

CN IX

• sensory and motor

• taste in caudal 2/3 of mouth

• motor to swallow

vagus

CN X

• sensory and motor

• control vital organs and parasympathetic nervous system (heart, lungs, GI)

accessory

CN XI

• motor

• shoulder and neck movement

hypoglossal

CN XII

• motor

• muscles of tongue

palpebral reflex

involuntary blink that occurs when the skin of the eyelids, cornea, or eyelashes are lightly touched

• tap near eye without them seeing you

Sensory = CN V

Motor = CN VII

menace response

takes cerebral cognitive processing → conscious decisions

• sudden, threatening hand gesture towards an animal's eye causes it to blink or pull back, indicating intact vision and a functional visual pathway

CN II - sensory (interpret)

CN VII - motor (blink)