Cranial Nerves

Question 1

1

Answer 1

Olfactory
- Sensory nerve
- Sense of smell
- Goes through cribriform plate of ethmoid bone
- roof of your nose

Question 2

2

Answer 2

Optic
- sensory nerve
- sense of sight
- some decussation  optic
- Opticradiation fibers run to occipital cortex

Question 3

3,4,6

Answer 3

3 – Oculomotor
4 – Trochlear
6 – Abducens

Purely motor
Innervates extrinsic muscles of the eye

Question 4

3

Answer 4

Oculomotor
- innervate extrinsic eye muscles

Question 5

4

Answer 5

Trochlear
- innervate extrinsic eye muscles

Question 6

6

Answer 6

Abducens
- innervate extrinsic eye muscles

Question 7

5

Answer 7

Trigeminal
- Sensory and motor
- Three divisions
(v1) ophthalmic (sensory)
(v2) maxillary (sensory)
(v3) mandibular (sensory)

Question 8

7

Answer 8

Facial
- Branches
- Sensory and motor
Sensory  taste anterior 2/3s of tongue
Motor  muscles of facial expressions

Question 9

8

Answer 9

Vestibulocochlear
- Two branches
- Mostly sensory
- Detects movements of your head (vestibular branch)
- Responsible for hearing (cochlear branch)

Question 10

9

Answer 10

Glossopharyngeal
- Sensory and motor
Sensory  taste posterior 1/3 of tongue
Motor  swallowing

Question 11

10

Answer 11

Vagus
- Everywhere below the neck
- Sensory and motor

Question 12

11

Answer 12

Accessory
- Purely motor
- Trapezius
- Sternocleidomastoid
- Originates from spinal cord

Question 13

12

Answer 13

Hypoglossal
- Purely motor
- Allows you to talk