Medial rectus muscle
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| Medial rectus | ||
|---|---|---|
| Rectus muscles: 2 = superior, 3 = inferior, 4 = medial, 5 = lateral Oblique muscles: 6 = superior, 8 = inferior Other muscle: 9 = levator palpebrae superioris Other structures: 1 = Annulus of Zinn, 7 = Trochlea, 10 = Superior tarsus, 11 = Sclera, 12 = Optic nerve | ||
| Figure showing the mode of innervation of the Recti medialis and lateralis of the eye. | ||
| Latin | Rectus medialis | |
| Gray's | subject #227 1022 | |
| Origin: | annulus of Zinn at the orbital apex | |
| Insertion: | 5.5 mm medial to the limbus | |
| Blood: | ||
| Nerve: | inferior division of the oculomotor nerve | |
| Action: | adducts the eyeball (makes it move inwards) | |
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.
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