ORBIT OF THE EYE

oculomotor n. (CN III)

superior branch

inferior branch

SUPERIOR RECTUS

MEDIAL RECTUS

INFERIOR RECTUS

insertion: sclera of eye

origin: common tendinous ring (common annular tendon)

action: vertical axis --> elevates, horizontal axis --> adducts, anteroposterior axis --> rotates medially

insertion: sclera of eye

origin: common tendinous ring (common annular tendon)

action: horizontal axis --> adducts

insertion: sclera of eye

origin: common tendinousring (common annular tendon)

action: vertical axis --> depresses, horizontal axis --> adducts, anteroposterior axis --> rotates laterally

INFERIOR OBLIQUE

action: vertical axis --> elevates, horizontal axis --> abducts, anteroposterior axis --> rotates medially

insertion: sclera of eye

origin: medial orbital margin

abducent (CN VI)

LATERAL RECTUS

insertion: sclera of eye

origin:common tendinous ring (common annular tendon)

action: horizontal axis --> adducts

trochlear n. (CN IV)

SUPERIOR OBLIQUE

insertion: sclera of eye

origin: sphenoid bone

action: horizontal axis --> abducts; rotates medially; depresses