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Inferior rectus
Eyemuscles.png
Rectus muscles:
2 = superior, 3 = inferior, 4 = medial, 5 = lateral
Oblique muscles: 6 = superior, 8 = inferior
Other muscle: 9 = levator palpebrae superioris
Other structures: 1 = Annulus of Zinn, 7 = Trochlea, 10 = Superior tarsus, 11 = Sclera, 12 = Optic nerve
Gray888.png
Sagittal section of right orbital cavity.
Latin musculus rectus inferior bulbi
Gray's subject #227 1022
Origin annulus of Zinn at the orbital apex
Insertion    6.5 mm inferior to the limbus
Artery
Nerve inferior branch of oculomotor nerve
Actions depression and adduction

The inferior rectus muscle is a muscle in the orbit.

Contents

Actions

It depresses, adducts, rotates laterally, and helps extort the eye.

Innervation

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

Additional images


credit: Patrick J. Lynch

External links

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