Anatomy

Origin

The superior rectus originates from the upper part of the common tendinous ring (anulus of Zinn), below the optic canal

Insertion

It inserts obliquely into the sclera below the cornea, approximately 6.5 mm behind the corneal limbus

Nerve

Oculomotor nerve (III cranial nerve)

Actions

The contractions of the inferior rectus provide the depression and lateral rotation of the eyeball (depression, adduction and external rotation)