Inferior rectus muscle

This tutorial covers the inferior rectus muscle, one of the six extraocular muscles controlling eye movement. It originates from the annulus of Zinn and inserts on the sclera. The muscle is responsible for extortion, reduction, and depression of the eye. It is innervated by the inferior branch of the ocular motor nerve and receives blood supply from the ophthalmic and infraorbital arteries.

What is the origin of the inferior rectus muscle?

Describe the movements controlled by the inferior rectus muscle when the eye is in a neutral position.

What role does the inferior rectus muscle play during adduction of the eye?

What is the nerve supply to the inferior rectus muscle?

Explain the arterial blood supply to the inferior rectus muscle.