superior tarsal muscle

superior tarsal muscle

n.

A layer of smooth muscle that extends from the aponeurosis of the elevator muscle of the upper eyelid to the superior tarsus, is innervated by sympathetic nerves, and acts to hold the upper lid in an elevated position.

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superior tarsal muscle,

a collection of smooth muscle fibers in companion with the levator palpebrae superioris passing from the inferior surface of the lavatory to the upper edge of the superior tarsus. Loss of function of either the levator palpebrae superioris or the superior tarsal muscle results in a ptosis of the upper eyelid.