Cranial Nerves

Question 1

CN____: olfactory nerve

Answer 1

I

Question 2

CN____: optic nerve

Answer 2

II

Question 3

CN____: oculomotor

Answer 3

III

Question 4

CN____: trochlear

Answer 4

IV

Question 5

CN____: trigeminal

Answer 5

V

Question 6

CN____: abducens

Answer 6

VI

Question 7

CN____: facial nerve

Answer 7

VII

Question 8

CN____: vestibulocochlear/acoustic

Answer 8

VIII

Question 9

CN____: glossopharangeal

Answer 9

IX

Question 10

CN____: vagus

Answer 10

X 10

Question 11

CN____: accessory

Answer 11

XI 11

Question 12

CN____: hypoglossal

Answer 12

XII 12

Question 13

What is the name and number of the nerve with the following characteristics?

Arises from cerebrum.

Exits skull through olfactory foramina in cribriform plate of ethmoid.

Function: Sensory only. Sense of smell.

Answer 13

1 Olfactory nerve

Question 14

Arises from diencephalon.

Exits skull through optic foramen of sphenoid.

Function: Sensory only. Vision.

Answer 14

2 optic nerve

Question 15

Arises from brain stem.

Exits skull through superior orbital fissure of sphenoid.

Function: Mixed nerve. Motor to intrinsic and extrinsic eye muscles. Sensory for muscle sense (proprioception) of same area.

Answer 15

3 oculomotor

Question 16

Arises from brain stem.

Exits skull through superior orbital fissure of sphenoid.

Function: Mixed nerve. Motor to extrinsic eye muscles. Sensory for muscle sense of same area.

Answer 16

4 trochlear

Question 17

Arises from brain stem.

Ophthalmic branch exits skull through superior orbital fissure.

Maxillary branch exits skull through foramen rotundum of sphenoid.

Mandibular branch exits skull through foramen ovale of sphenoid.

Function: Mixed nerve. Motor to mastication muscles. Sensory to face, scalp, tear glands, mucous membranes of the nasal cavity and mouth.

Answer 17

5 trigeminal

Question 18

Arises from brain stem.

Exits skull through superior orbital fissure.

Function: Mixed nerve. Motor to extrinsic eye muscles. Sensory for muscle sense of same area.

Answer 18

6 abducens

Question 19

Arises from brain stem.

Exits skull through stylomastoid foramen of temporal bone.

Function: Mixed nerve. Motor to muscles of facial expression, salivation, and lacrimation. Sensory for taste and muscle sense.

Answer 19

7 Facial nerve

Question 20

Arises from brain stem.

Exits skull through internal auditory meatus of temporal bone.

Function: Sensory only. Vestibular branch is sensory for equilibrium; cochlear branch is sensory for hearing.

Answer 20

8 acoustic

Question 21

Arises from brain stem.

Exits skull through jugular foramen of temporal bone.

Function: Mixed nerve. Motor to swallowing and salivation. Sensory for taste from posterior part of tongue and muscle sense.

Answer 21

9 glossopharangeal

Question 22

Arises from brain stem.

Exits skull through jugular foramen.

Function: Mixed nerve. Motor to pharynx, larynx, viscera of thorax and abdomen (Parasympathetic Nervous System). Sensory for muscle sense to same areas and taste.

Answer 22

10 vagus

Question 23

Comprised of 2 nerves; cranial one arises from brain stem, spinal nerve arises from cervical spinal cord.

Exits skull through jugular foramen.

Function: Mixed nerve. Motor to muscles of pharynx and larynx, and to head movement muscles (Sternocleidomastoid, Trapezius). Sensory for muscle sense to the same area.

Answer 23

11 accessory nerve

Question 24

Arises from brain stem.

Exits skull through hypoglossal canal of occipital bone.

Function: Mixed nerve. Motor to tongue. Sensory for muscle sense of tongue.

Answer 24

12 hypoglossal nerve