Medial rectus muscle
The medial rectus muscle is a muscle in the orbit.
As with most of the muscles of the orbit, it is innervated by the inferior division of the oculomotor nerve (Cranial Nerve III).
This muscle shares an origin with several other extrinsic eye muscles, the anulus tendineus, or common tendon.
It is the largest of the extraocular muscles and its only action is adduction of the eyeball.
Additional images
Additional images
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Horizontal section of the eyeball. -
Dissection showing origins of right ocular muscles, and nerves entering by the superior orbital fissure. -
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