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 musculus rectus medialis bulbi
Gray's subject #227 1022
Origin: annulus of Zinn at the orbital apex
Insertion: 5.5 mm medial to the limbus
Nerve: inferior division of the oculomotor nerve
Action: adducts the eyeball (makes it move inwards)
Dorlands/Elsevier m_22/12550510

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

External links

hu:Musculus rectus medialis nl:Musculus rectus medialis