CN III: Oculomotor

Question 1

CN III Function (2)?

Answer 1

Supplies internal eye movement
AND
external muscles of the eyes

Question 2

CN III fibers project IPS or CON?

Answer 2

IPS and CON

Question 3

CN III source?

Answer 3

Cortex

Question 4

CN III: Sensory or Motor?

Answer 4

Motor

Question 5

CN III dysfunction results in poor visual field alignment as a result of weak muscle control
–>it is also known as “double vision”

Answer 5

Diplopia

Question 6

CN III dysfunction results in damage to the nerve that supplies the levator muscle for opening the eyelid
–> it is also known as “sleepy or lazy eye”

Answer 6

Ptosis

Question 7

CN III dysfunction when one eye muscle is weak, in this particular case the medial is weak
–> it is also known as “down and out position”

Answer 7

Strabismus

Question 8

CN III dysfunction when the individual is unable to constrict pupils in response to light and remain in a dilated position

Answer 8

Visceral Motor Fiber Dysfunction

Question 9

2 CN III nuclei

Answer 9

1. Oculomotor-Skeletal

2. Accessory Oculomotor-Smooth/Organ