Inferior rectus

Inferior Rectus

The Inferior Rectus is one of the six extraocular muscles that control the movements of the eye. It is part of the ocular motor system and is responsible for downward gaze and eye rotation.

Anatomy

The Inferior Rectus originates from the Annulus of Zinn, a tendinous ring in the orbit, and inserts into the anterior surface of the eye. It is innervated by the inferior division of the oculomotor nerve (Cranial Nerve III).

Function

The primary function of the Inferior Rectus is to depress the eye (look down). It also contributes to adduction (movement of the eye towards the nose) and internal rotation of the eye.

Clinical Significance

Damage to the Inferior Rectus can result in diplopia (double vision) and difficulty in looking down. This can be caused by trauma, neuromuscular diseases, or compression of the oculomotor nerve.

See Also

• Extraocular muscles
• Oculomotor nerve
• Diplopia

References

Inferior rectus Resources
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