Inferior rectus muscle

Inferior rectus

The inferior rectus muscle, is shown in this superior view of the eye, along with its axis of rotation. The other muscle is the superior oblique muscle, which angles around the trochlea.
Origin annulus of Zinn at the orbital apex
Insertion 6.5 mm inferior to the limbus
Nerve inferior branch of oculomotor nerve
Actions depression and adduction
Latin musculus rectus inferior bulbi
TA A15.2.07.011
FMA 49036

Anatomical terms of muscle

The inferior rectus muscle is a muscle in the orbit.



As with most of the muscles of the orbit, it is innervated by the oculomotor nerve (Cranial Nerve III).


See also: Eye movement

It 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.[1]

Additional images


  1. "Eye Theory". Retrieved 2010-11-27.
This article is issued from Wikipedia - version of the 5/24/2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.