2.3 Cranial Nerves Part 2

Question 1

What is the only cranial nerve that does not attach to the brainstem?

Answer 1

CN1 olfactory nerve

Question 2

What is CN II?

Answer 2

optic nerve

Question 3

What type of cranial nerve is CNII?

Answer 3

special sensory nerve

Question 4

What is the function of CNII?

Answer 4

sense of sight

Question 5

Where does CNII originate and terminate?

Answer 5

originates = retinas of each eye
terminates = thalamus

Question 6

Where do the CNII nerves cross?

Answer 6

optic chiasm

Question 7

What is CNIII?

Answer 7

occulomotor nerve

Question 8

What type of cranial nerve is CN III?

Answer 8

motor nerve

Question 9

What is the function of CN III?

Answer 9

eye movement in both somatic motor and visceral motor systems

Question 10

What do the somatic motor movements of CN III control?

Answer 10

superior, inferior, an medial rectus

Question 11

What do the visceral motor division of CN III control?

Answer 11

dilation of the pupil

Question 12

What is CN IV?

Answer 12

trochlear nerve

Question 13

What type of cranial nerve is CN IV?

Answer 13

somatic motor nerve

Question 14

What is the function of CN IV?

Answer 14

eye movement

Question 15

What does CN IV innervate?

Answer 15

superior oblique muscle of the eye

Question 16

What is CN V?

Answer 16

trigeminal nerve

Question 17

What type of cranial nerve is CN V?

Answer 17

mixed motor and sensory cranial nerve

Question 18

What is the trigeminal nerve responsible for?

Answer 18

chewing
sensation of face, nose and mouth

Question 19

What are the three branches of the trigenimal nerve?

Answer 19

ophthalmic branch
maxillary branch
mandibular branch

Question 20

What is the opthalmic banch responsible for?

Answer 20

receiving sensory information from the skin around the forehead to the eyebrows and upper part of the nose