Superior rectus muscle
| Superior rectus | |
|---|---|
View of the eye from above, showing the action of the superior rectus muscle. | |
| Details | |
| Origin | Annulus of Zinn at the orbital apex |
| Insertion | 7.9 mm superior to the corneal limbus |
| Nerve | Oculomotor nerve |
| Actions | Elevation, adduction, intorsion |
| Identifiers | |
| Latin | musculus rectus superior bulbi |
| TA98 | A15.2.07.010 |
| TA2 | 2042 |
| FMA | 49035 |
| Anatomical terms of muscle | |
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 (III). In the primary position (looking straight ahead), its primary function is elevation, although it also contributes to intorsion and adduction. It is associated with a number of medical conditions, and may be weak, paralysed, overreactive, or even congenitally absent in some people.