| Superior rectus | |
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| 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 |
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| Sagittal section of right orbital cavity. | |
| Latin | musculus rectus superior bulbi |
| Gray's | subject #227 1022 |
| Origin | annulus of Zinn at the orbital apex |
| Insertion | 7.5 mm superior to the limbus |
| Artery | |
| Nerve | oculomotor nerve |
| Actions | elevates, intorsion, and rotates medially the eye |
The superior rectus muscle is a muscle in the orbit. It is one of the extraocular muscles. It is innervated by the superior division of the oculomotor nerve (Cranial Nerve III). In the primary position (looking straight ahead), the superior rectus muscle's primary function is elevation, although it also contributes to intorsion and adduction.
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The superior rectus muscle is the only muscle that is capable of elevating the pupil when it is in a fully adducted position.[1]
credit: Patrick J. Lynch
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