human_reference_atlas Homo sapiens extra-ocular muscle inferior rectus extraocular muscle http://upload.wikimedia.org/wikipedia/commons/e/e8/Eyemuscles.png MA:0001279 musculus rectus inferior bulbi Wikipedia:Inferior_rectus_muscle 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.[well established][VHOG] inferior rectus extraocular muscle uberon UBERON:0006322 inferior rectus ZFA:0000457 AS ventral rectus inferior rectus extraocular muscle NCIT:C32790 VHOG:0001130 inferior rectus muscle m. rectus inferior ventral rectus extraocular muscle TAO:0000457 UMLS:C0582819 A muscle in the orbit that depresses, adducts, and helps extort (rotate laterally) the eye. The inferior rectus muscle is the only muscle that is capable of depressing the pupil when it is in a fully abducted position. FMA:49036 musculus rectus inferior SCTID:181154009 ventral recti AAO:0010101 rectus extraocular muscle