Medial rectus muscle

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 [edit on Wikidata]

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).