CN 3 4 6

Question 1

What is the primary function of CN 3 4 6

Answer 1

Eye movements

Question 2

What is the primary function of the medial longitudinal fasciculus

Answer 2

Coordinate eye movement

Question 3

What lobe controls mostly saccadic eye movement (fast/rapid)

Answer 3

Frontal lobe

Question 4

What lobe controls smooth eye movement

Answer 4

Occipital lobe

Question 5

What is involuntary eye oscillations

Answer 5

Nystagmus

Question 6

A disease of CN 3 will usually result in what signs

Answer 6

Eyelid ptosis

Corectasia

Question 7

a disease of CN 4 will usualy result in what signs

Answer 7

Difficulty looking down

Question 8

a disease of CN 6 will usually result in what signs

Answer 8

Unable to laterally deviate the eye

Question 9

A lesions distal to the bifurcation of the carotid arteries will cause what if is along the intranal carotid pathway

Answer 9

Pupilloconstriction and ptosis

Question 10

A lesion distal to the bifurcation of the carotid artery will cause what if it along the external carotid pathway

Answer 10

Vasodilation

Anhydrosis

Question 11

What is an inward sinking of the eyeball that is caused by sympathetic paralysis

Answer 11

Enophthalmos

Question 12

How do you perform a siliospinal reflex

Answer 12

Pinching the skin on the patients neck (observe bilateral pupillodilation

Question 13

What is the test for peripheral vision also called

Answer 13

Confrontation

Question 14

What 3 things happen when testing for accommodation

Answer 14

Convergence (CN 3)
Pupilloconstriction (CN 3 parasymp)
Lens thickening (CN 3)

Question 15

What test is used to look for equal pupiloconstriction

Answer 15

Swingingflashlight test

Question 16

What is it called when apparent pupillodilation is observed during the swinging flashlight test

Answer 16

Marcus Gunn phenomenon