Extrinsic eye muscles

Question 1

Innervation of levator palpebrae superioris

Answer 1

CN III, upper division

Question 2

Innervation of superior rectus

Answer 2

CN III, upper division

Question 3

Innervation of inferior rectus

Answer 3

CN III, lower division

Question 4

Innervation of medial rectus

Answer 4

CN III, lower division

Question 5

Innervation of lateral rectus

Answer 5

CN VI

Question 6

Innervation of superior oblique

Answer 6

CN IV

Question 7

Innervation of inferior oblique

Answer 7

CN III, lower division

Question 8

Origin and insertion of levator palpebrae superioris

Answer 8

O: lesser wing of sphenoid

I: superior tarsal plate, skin of eyelid

Question 9

Action of levator palpbrae superioris

Answer 9

elevate upper eyelid

Question 10

Common tendinous ring is the origin for what muscles?

Answer 10

superior, inferior, medial, lateral rectus muscles

Question 11

The anterior hemisphere of the eyeball is the insertion of what muscles?

Answer 11

superior, inferior, medial, lateral rectus muscles

Question 12

Action of superior rectus muscle

Answer 12

elevation, adduction, intorsion of eyeball

Question 13

action of inferior rectus

Answer 13

depression, adduction, extorsion of eyeball

Question 14

action of medial rectus

Answer 14

adduction of eyeball

Question 15

action of lateral rectus

Answer 15

abduction of eyeball

Question 16

Origin and insertion of superior oblique

Answer 16

O: body of sphenoid

I: lateral posterio quadrant of eyeball

Question 17

Origin and insertion of inferior oblique

Answer 17

O: medial floor of orbit posterior to rim

I: lateral posterior quadrant of eyeball

Question 18

action of superior oblique

Answer 18

depression, abduction, intorsion of eyeball

Question 19

action of inferior oblique

Answer 19

elevation, abduction, extorsion of eyeball