Functions

Question 1

I

Answer 1

1) afferent olfactory (nerve only travels from sinus to bulb; olfactory tract is what you see on the brain)

Question 2

II

Answer 2

1) afferent visual from retina (not a nerve at all, but an extension of the brain)

Question 3

III

Answer 3

1) efferent motor to eye (medial, superior, and inferior rectus muscles and inferior oblique muscle, levator palpebrae);
2) efferent parasympathetic to eye (pupillary constriction)

Question 4

IV

Answer 4

1) efferent motor to superior oblique muscle

Question 5

Va

Answer 5

1) afferent sensory from upper face, including cornea (forehead, upper eyelid, cornea, conjunctiva, dorsum of nose, nasal membranes)

Question 6

Vb

Answer 6

1) afferent sensory from middle portion of face and upper jaw (upper lip, lateral nose, upper cheek, anterior temple, membranes of nose, upper jaw and teeth, roof of mouth)

Question 7

Vc

Answer 7

1) efferent motor to muscles of mastication;
2) afferent sensory to lower face and jaw (lower lip, chin, posterior cheek, temple, external ear, lower jaw and teeth, cheeks, floor of mouth, anterior two thirds of tongue)

Question 8

VI

Answer 8

1) efferent motor to lateral rectus

Question 9

VII

Answer 9

1) efferent motor to superficial facial muscles and stapedius (also posterior belly of digastric muscle);
2) efferent parasympathetic fibers (lacrimal and
salivary glands);
3) afferent gustatory (taste) from anterior tongue;
4) afferent sensory from portion of external ear skin

Question 10

VIIIv

Answer 10

1) afferent vestibular information from labyrinth

Question 11

VIIIc

Answer 11

1) afferent auditory information from cochlea

Question 12

IX

Answer 12

1) efferent motor to pharynx skeletal muscle;
2) efferent parasympathetic fibers to parotid gland;
3) afferent sensory from portion of external ear skin;
4) afferent sensory from pharynx, middle ear, carotid body and sinus;
5) afferent gustatory from posterior tongue

Question 13

X

Answer 13

1) efferent motor to striated muscle of palate, pharynx, larynx;
2) efferent parasympathetic fibers to viscera
3) afferent sensory from portion of external ear skin, meninges;
4) afferent sensory from larynx, trachea, gut, aortic
arch;
5) afferent taste from larynx

Question 14

XI

Answer 14

1) efferent motor to sternocleidomastoid and trapezius

Question 15

XII

Answer 15

1) efferent motor to tongue (intrinsic and extrinsic)

Question 16

Which cranial nerves provide efferent sensory fibers to the Ear?

Answer 16

1) Vc
2) VII
3) IX
4) X

Question 17

Which cranial nerves provide afferent gustatory fibers?

Answer 17

1) VII from anterior tongue
2) IX from posterior tongue
3) X from larynx

Question 18

Which cranial nerves have efferent parasympathetic fibers?

Answer 18

1) III to eye for pupillary contriction
2) VII to the lacrimal and salivary glands
3) IX to parotid gland
4) X to viscera