Inferior rectus muscle

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Inferior rectus
Eye movements depressors.jpg
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 inferior division of oculomotor nerve (Cranial Nerve III).


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[edit]


  1. ^ "Eye Theory". Retrieved 2010-11-27. 

External links[edit]