Inferior rectus muscle Information & Inferior rectus muscle Links at HealthHaven.com

Inferior rectus
	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
	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.

[edit] Actions

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

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

Eye movement of lateral rectus muscle, superior view	Eye movement of medial rectus muscle, superior view	Eye movement of inferior rectus muscle, superior view	Eye movement of superior rectus muscle, superior view
Eye movement of superior oblique muscle, superior view	Eye movement of inferior oblique muscle, superior view	Anterior view