Extrinsic Muscles of the Eye (Extraocular muscles)

Question 1

Levator palpebrae superioris

Answer 1

roof of orbit rostral to optic canal

deep surface of upper eyelid (tarsus),
superior tarsus, and superior fornix of the conjunctiva

raises upper lid

Superior division of III

Question 2

Superior Rectus

Answer 2

annulus tendineus communis

sclera of anterior hemisphere 7mm from margin of cornea

elevates and adducts eyeball; intorts

Superior division of III

Question 3

Inferior Rectus

Answer 3

annulus tendineus communis

sclera of anterior hemisphere 6mm from margin of cornea

depresses and adducts eyeball; extorts

Inferior division of III

Question 4

Lateral Rectus

Answer 4

annulus tendineus communis

sclera of anterior hemisphere 7mm from margin of cornea

abducts eyeball

VI

Question 5

Medial Rectus

Answer 5

annulus tendineus communis

sclera of anterior hemisphere 5.5mm from margin of cornea

adducts eyeball

III

Question 6

Superior Oblique

Answer 6

sphenoid, above margin of optic foramen

sclera of posterior hemisphere between superior and lateral recti

depresses and abducts eyeball; intorts

IV

Question 7

Inferior Oblique

Answer 7

maxillary portion
of orbital floor,lateral to nasolacrimal canal

sclera of posterior hemisphere between superior and
lateral recti

elevates and abducts eyeball; extorts

Inferior division of III