Cranial Nerves

Question 1

Olfactory

Answer 1

Afferent (Sensory) Smell:Nose

Test: Identify familiar smells

Question 2

Optic

Answer 2

Afferent (Sensory) Sight:Eyes

Test: Test visual fields

Question 3

Oculomotor

Answer 3

Afferent (Sensory) Sight:Eyes

Efferent(Motor): voluntary motor, lavatory to eyelid, superior, medial, and inferior recti, inferior oblique muscle of eyeball.
Autonomic: Smooth muscle of eyeball

Test: Upward, downwards and Medial gaze and reaction to light

Question 4

Trochlear

Answer 4

Afferent (Sensory): Sight: Eyes

Efferent(Motor): voluntary motor: Superior oblique muscle of eyeball.

Test: Downward and inward gaze

Question 5

Trigminal

Answer 5

Afferent (Sensory): Touch, pain: Skin of face, mucous membranes of nose, sinuses, mouth, anterior tongue.

Efferent (Motor): voluntarily motor: muscles of mastication

Test: corneal reflex, face sensation, clench teeth; push down on chin to separate jaw.

Question 6

Abducens

Answer 6

Efferent (Motor): Voluntary Motor: Lateral recurs muscle of eyeballs.

Test: Lateral Gaze

Question 7

Facial

Answer 7

Afferent (Sensory): Taste: Anterior Tongue

Efferent (Motor): Voluntary Motor: Facial muscles.
-Autonomic: Lacrimal, submandibular, and sublingual glands.

Test: Close eyes tight, smile and show teeth, whistle and puff cheeks. Identify familiar tastes (e.g., sweet and sour)

Question 8

Vestibulocochlear

Acoustic nerve

Answer 8

Afferent (Sensory): Hearing: Ear and Balance: Ear

Test: Hear watch ticking, hearing tests and, balance and coordination tests

Question 9

Glossopharyngeal

Answer 9

Afferent (Sensory): Touch, pain: Posterior tongue, pharynx. Taste: Posterior Tongue

Efferent (Motor): Voluntary Motor: select muscles of pharynx. Autonomic: parotid gland

Test: gag reflex and ability to swallow

Question 10

Vagus

Answer 10

Afferent (Sensory): touch pain: pharynx, larynx, and bronchi. Taste: tongue and epiglottis

Efferent (Motor): voluntary motor: muscles of palate, pharynx, and larynx. Autonomic: thoracic and abdominal viscera

Test: gag reflex, ability to swallow, say “ahhh”

Question 11

Accessory

Answer 11

Efferent (Motor): voluntary motor: sternocleidomastoid and trapezius muscle

Test: Resisted shoulder shrug

Question 12

Hypo gloss all

Answer 12

Efferent (motor): voluntary motor: muscles of tongue

Test: to urge protrusion (if injured, younger deviates toward injured side.)