Tri B - Cranial Nerves

Question 1

What does the PNS consist of?

Answer 1

Sensory neurons - carry impulses from receptors to periphery
Motor neurons - carry impulses from CNS to muscles and glands

Question 2

What does the somatic nervous system consist of?

Answer 2

12 pairs of cranial nerves
31 pairs of spinal nerves
Ganglia

Question 3

Describe CNi (1)

Answer 3

Olfactory nerve - Sensory
Sense of smell

Question 4

Describe CNii (2)

Answer 4

Optic nerve - sensory
Sense of sight

Question 5

Describe CNiii (3)

Answer 5

Oculomotor - motor
Movement of eyeball - elevation, abduction

Question 6

Describe CNiv (4)

Answer 6

Trochlear - motor
Movement of eyeball - depression

Question 7

Describe CNv (5)

Answer 7

Trigeminal nerves - mixed
Primarily face sensation, also chewing, swallowing

Question 8

Describe CNvi (6)

Answer 8

Abducent - motor
Movement of the eyeball - abduction

Question 9

Describe CNvii (7)

Answer 9

Facial - mixed
Facial expression, sense of taste

Question 10

Describe CNviii (8)

Answer 10

Vestibulocochlear - sensory
Sense of hearing - passes through auditory canal

Question 11

Describe CNix (9)

Answer 11

Glossopharyngeal - mixed
Taste; secretion of saliva, movement of pharynx

Question 12

Describe CNx (10)

Answer 12

Vagus - mixed
Taste; talking and swallowing; secretion

Question 13

Describe CNxi (11)

Answer 13

Accessory - motor
Swallowing, movement of head and shoulders

Question 14

Describe CNxii (12)

Answer 14

Hypoglossal - motor
Tongue movement