part of part of innervated by medial rectus extraocular muscle FMA:49037 m. rectus medialis medial recti MA:0001281 medial rectus TAO:0000301 Taxon notes (from VHOG): "The ability to rotate the eyeball is common to all vertebrates with well-developed eyes, regardless of the habitat in which they live, so these [extrinsic ocular] muscles tend to be conservative. They change little during the course of evolution." Liem KF, Bemis WE, Walker WF, Grande L, Functional Anatomy of the Vertebrates: An Evolutionary Perspective, Third Edition (2001) Orlando Fla.: Harcourt College Publishers, p.331 [VHOG:0001127] UBERON:0004836 SCTID:181151001 UBERON:0001602 musculus rectus medialis bulbi medial rectus muscle medial rectus extraocular muscle AAO:0010113 NCIT:C33068 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. [WP,unvetted]. Wikipedia:Medial_rectus_muscle VHOG:0001127 ZFA:0000301 musculus rectus medialis oculomotor nerve cranial muscle rectus extraocular muscle