Bradley Blair Osteopath on Instagram: "Superior rectus is one of the extrinsic muscles of the eye. Being located outside the eyeball but within the orbit, it belongs to a group called the extraocular muscles. Superior rectus spans from the common tendinous ring (annulus of Zinn) to the superior aspect of the eyeball, just posterior to the corneal limbus (corneoscleral junction). The largest part of superior rectus originates from the superior portion of the common tendinous ring, superolaterally