[TA] extraocular muscle in orbit; origin, orbital surface of the lesser wing of the sphenoid, above and anterior to the optic canal; insertion, skin of eyelid, tarsal plate, and orbital walls, by medial and lateral expansions of the aponeurosis of insertion; action, raises the upper eyelid; nerve supply, oculomotor. SYN: musculus levator palpebrae superioris [TA], elevator (muscle) of upper eyelid, musculus orbitopalpebralis, palpebralis.