Cranial Nerves Function

Question 1

Name the twelve Cranial nerves

Answer 1

1. Olfactory
2. Optic
3. Oculomotor
4. Trochlear
5. Trigeminal
6. Abducens
7. Facial
8. Vestibulocochlear
9. Glossopharyngeal
10. Vagus
11. Accessory
12. Hypoglossal

Question 2

Function of Olfactory (I) ?

Answer 2

Sensory: Smell

Question 3

Function of Optic (II) ?

Answer 3

Sensory: eye

Question 4

Function of Oculomotor (III) ?

Answer 4

Motor: all eye muscles except those supplied by IV and VI

Question 5

Function of Trochlear (IV) ?

Answer 5

Eye movement downward and inward

Question 6

Function of Trigeminal (V)?

Answer 6

Sensory: face, sinuses & teeth, anterior tongue
Motor: muscles of mastication
NOTE: facial aspect is divided into three hence why you check sensation of top middle and bottom of face

Question 7

Function of Abducens (VI) ?

Answer 7

Motor: Eye movements side to side

Question 8

Function of facial (VII) ?

Answer 8

Motor: muscles of face

Question 9

Function of vestibulocochlear (VIII) ?

Answer 9

Sensory: hearing and balance

Question 10

Function of Glossopharyngeal (IX)?

Answer 10

Motor: Pharynx
Sensory: posterior part of tongue, tonsil, pharynx

Question 11

Function of Vagus (X) ?

Answer 11

Sensory: heart, lungs, larynx, pharynx, gi tract, external ear
Motor: heart, lungs, gi tract

Question 12

Function of accessory nerve (XI) ?

Answer 12

Motor: sternocleidomastoid and trapezius muscles

Question 13

Function of Hypoglossal (XII) ?

Answer 13

Motor: muscles of tongue