inferior oblique muscle

in·fer·i·or ob·lique mus·cle

(in-fēr'ē-ŏr ō-blēk' mŭs'ĕl)

Origin, orbital plate of maxilla lateral to the lacrimal groove; insertion, sclera between the superior and lateral recti; action, primary, extorsion; secondary, elevation and abduction; nerve supply, oculomotor (inferior branch).
Synonym(s): musculus obliquus inferior [TA] .

inferior oblique muscle

Extraocular muscle. Origin: inside front lower margin of maxillary part of orbit. Insertion: lateral surface of eyeball behind its equator. Nerve: oculomotor (CN III). Action: turns eye up and outward with lateral rotation.

See: extraocular for illus.

See also: muscle