Dorlands/Elsevier m_22/12550523 | ||
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Origin annulus of Zinn at the orbital apex Insertion 7.5 mm superior to the limbus Latin musculus rectus superior bulbi | ||
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.
Contents
Function
It elevates, adducts, and helps intort (rotate medially) the eye.
Testing
The superior rectus muscle is the only muscle that is capable of elevating the pupil when it is in a fully abducted position.
References
Superior rectus muscle Wikipedia(Text) CC BY-SA