12 cranial nerves

Question 1

CNI - olfactory nerve

Answer 1

Innervates nasal mucosa, smell

Question 2

CNII - optic nerve

Answer 2

Afferent for vision from the retina

Question 3

CNIII - oculomotor nerve

Answer 3

somatic - eye movement
autonomic - pupil constrictors

Question 4

CNIV - trochlear nerve

Answer 4

somatic movement of the eye

Question 5

CNV - trigeminal nerve

Answer 5

somatic - afferent from skin surface of face (dermatome), motor to muscles of mastication (myotome)

Question 6

CNVI - abducent nerve

Answer 6

Somatic - motor efferent to one muscle of the eye.

Question 7

CNVII - facial nerve

Answer 7

special sense - taste from anterior tongue and palate
somatic - motor efferent to muscles of facial expression
autonomic - motor efferent to glands that secrete saliva glands

Question 8

CNVIII - vestibulocochlear nerve

Answer 8

special sense - hearing from cochlea of the ear (balance)

Question 9

CNIX - glossopharyngeal nerve

Answer 9

special sense - taste from posterior tongue
somatic - motor efferent to help with swallowing
autonomic - secretomotor to one saliva gland

Question 10

why is the vagus nerve different

Answer 10

supplies structures beyond head and neck

Question 11

CNX - vagus nerve

Answer 11

somatic - motor to muscles of pharynx, larynx and palate
autonomic - parasympathetic innervation of smooth muscle in trachea, bronchi, GI tract and cardiac muscle. Afferent sensation from GI tract, heart and airways

Question 12

CNXI - accessory nerve

Answer 12

somatic - motor to two big muscles in the nec

Question 13

CNXII - hypoglossol nerve

Answer 13

somatic - motor to muscles in the tongue