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