Appendix C

Question 1

CN #I

Answer 1

Olfactory

Carries olfactory input to brain by way of the olfactory bulb and tract.

interpreted in uncus

Question 2

CN #II

Answer 2

Optic

Carries vision information from retina to brain via optic tracts, nerves, and chiasma

interpreted in calcarine sulcus

Question 3

CN #III

Answer 3

Oculomotor (Somatic)

Controls 4 of 6 eye muscles

Has parasympathetic control over smooth muscles in eye to allow more or less light in and to see objects at distances but also to rapidly switch to objects that are close and to stay in focus

Question 4

CN #IV

Answer 4

Trochlear

Controls one eye muscle

Question 5

CN #V

Answer 5

Trigeminal

largest cranial nerve and originates from lateral side of pons

Three divisions: ophthalmic, maxillary, and mandibular

motor to help us chew

sensory carries pain, temp, light and deep touch for facial areas

Question 6

CN #VI

Answer 6

Abducens

Controls one eye muscle

Question 7

CN #VII

Answer 7

Facial

motor: nerve for muscles of facial expression and lacrimal glands (parasympathetic)
sensory: gustation from anterior part of tongue

Question 8

CN #VIII

Answer 8

Vestibulocochlear (auditory)

carries equillibrium input from inner ear

interpreted in superior temporal gyrus of temporal lobe

Question 9

CN #IX

Answer 9

Glossopharyngeal

motor and sensory supply to pharynx tissues and posterior portion of tongue

parasympathetic control of salivary glands

Question 10

CN #X

Answer 10

Vagus

longest cranial nerve

innervates thorax and abdomen structures

80% afferent and small parasympathetic control

Question 11

CN #XI

Answer 11

Spinal Accessory

motor coming M.O. and partly from C1-C5

some fibers join with vagus

innervates sternocleidomastoid and trapezius

Question 12

CN #XII

Answer 12

Hypoglossal

controls major muscles that move tongue