L5 - CNS (Cranial Nerves)

Question 1

Which is cranial nerve I? What route does it take?

Answer 1

Olfactory nerve; olfactory tract, olfactory bulb, cribriform plate

Question 2

Which is cranial nerve II? What route does it take?

Answer 2

Optic nerve; optic tract, optic chasm, optic canal

Question 3

Which is cranial nerve III? What route does it take?

Answer 3

Oculomotor nerve; superior orbital fissure

Question 4

Which is cranial nerve IV? What route does it take?

Answer 4

Trochlear nerve; superior orbital fissure

Question 5

Which is cranial nerve V? What route does it take?

Answer 5

Trigeminal nerve (ophthalmic, maxillary, and mandibular branches);

V1 - superior orbital foramen, supraorbital foramen;
V2 - foramen rotundum, inferior orbital foramen, infraorbital foramen;
V3 - foramen ovale, mandibular foramen, mental foramen

Question 6

Which is cranial nerve VI? What route does it take?

Answer 6

Abducens nerve; superior orbital fissure

Question 7

Which is cranial nerve VII? What route does it take?

Answer 7

Facial nerve; internal auditory meatus, stylomastoid foramen

Question 8

Which is cranial nerve VIII? What route does it take?

Answer 8

Vestibulocochlear nerve; internal auditory meatus

Question 9

Which is cranial nerve IX? What route does it take?

Answer 9

Glossopharyngeal nerve; jugular foramen

Question 10

Which is cranial nerve X? What route does it take?

Answer 10

Vagus nerve; jugular foramen

Question 11

Which is cranial nerve XI? What route does it take?

Answer 11

Accessory nerve; jugular foramen

Question 12

Which is cranial nerve XII? What route does it take?

Answer 12

Hypoglossal nerve; hypoglossal canal

Question 13

Is CN I sensory or motor?

Answer 13

Sensory; olfaction

Question 14

Is CN II sensory or motor?

Answer 14

Sensory; sight

Question 15

Is CN III sensory or motor?

Answer 15

Motor; ciliary muscle, all external eye muscles (except the lateral rectus and superior oblique) - moves eye, constricts pupil

Question 16

Is CN IV sensory or motor?

Answer 16

Motor; superior oblique

Question 17

Is CN V sensory or motor?

Answer 17

Both;

Question 18

Is CN VI sensory or motor?

Answer 18

Motor; lateral rectus

Question 19

Is CN VII sensory or motor?

Answer 19

Both;
sensory - taste
motor - muscles of facial expression, saliva and tear secretion

Question 20

Is CN VIII sensory or motor?

Answer 20

Sensory; audition, balance, posture

Question 21

Is CN IX sensory or motor?

Answer 21

Both;
sensory - taste
motor - swallowing, saliva secretion

Question 22

Is CN X sensory or motor?

Answer 22

Both; 70% of parasympathetic division of ANS

Question 23

Is CN XI sensory or motor?

Answer 23

Motor; trapezius and sternocleidomastoid

Question 24

Is CN XII sensory or motor?

Answer 24

Motor; tongue