Inferior rectus muscle

The inferior rectus muscle is a muscle in the orbit.

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.
Originannulus of Zinn at the orbital apex
Insertion6.5 mm inferior to the limbus
Nerveinferior branch of oculomotor nerve
Actionsdepression and adduction
Latinmusculus rectus inferior bulbi
Anatomical terms of muscle



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


It depresses, adducts, and helps extort 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.
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