Levator palpebrae superioris muscle

The levator palpebrae superioris ( latin for " lifter of the upper lid ") is a skeletal muscle in the eye socket (orbit ), which pulls the upper eyelid up and back and thus is responsible for the opening of the palpebral fissure. He also performs rectified movements with the musculus rectus superior, so that the upper eyelid lifts and lowers the upward glance at Abblick. It rises within the tendinous ring communis on the small wing of the sphenoid bone in the orbital apex, pulls over the musculus rectus superior forward and continues with its tendon as a fan- like plate ( Levatoraponeurose ) in the connective tissue orbital septum and cartilaginous connective tissue of the upper eyelid, the tarsus, at. The levator palpebrae superioris is the cranial nerve III, the oculomotor nerve, innervated and that of its smaller terminal branch, the ramus superior.

Loss of function of the muscle leads to a partial or complete dropping of the eyelid (ptosis ), and also has a limitation of joint movement of the upper eyelid in vertical gaze turns in the rule. Congenital ptosis is rarely the result of paralysis of the oculomotor nerve rather than a malformation of the muscles of the levator palpebrae superioris itself Another congenital disorder is the Marcus - Gunn syndrome, a paradoxical Koinnervation of the lateral pterygoid muscle and levator palpebrae superioris.

A relative overactivity of the muscle may result in a paretic limitation of view sufficiency. Here, a stronger impulse to glance phrase is transposed only partially included in the appropriate muscles upwards, affects this but in full to the synergistic movement of the levator palpebrae superioris out, resulting in an abnormal pulling of the upper lid.

In his role as the levator palpebrae superioris levator M. is a direct antagonist of the orbicularis oculi muscle.