Medial rectus muscle
The medial rectus muscle is a muscle in the orbit near the eye. It is one of the extraocular muscles. It originates from the common tendinous ring, and inserts into the anteromedial surface of the eye. It is supplied by the inferior division of the oculomotor nerve (III). It rotates the eye medially (adduction).
| 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 = Common tendinous ring, 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. | |
| Details | |
| Origin | common tendinous ring at the orbital apex |
| Insertion | 5.5 mm medial to the limbus |
| Nerve | inferior division of the oculomotor nerve |
| Actions | adducts the eyeball (makes it move inwards) |
| Identifiers | |
| Latin | musculus rectus medialis bulbi |
| TA98 | A15.2.07.012 |
| TA2 | 2044 |
| FMA | 49037 |
| Anatomical terms of muscle | |
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