Levator Palpebrae Superioris Muscle

Levator Palpebrae Superioris Muscle

Write about the origin, insertion, nerve supply and actions of the levator palpebrae superioris muscle.
Answer.

Levator Palpebrae Superioris Muscle Origin: From the undersurface of the lesser wing of the sphenoid near the apex of the orbit.

Levator Palpebrae Superioris Muscle Insertion

• Upper major skeletal part, into the skin of the upper eyelid.
• Lower minor smooth part (also called Müller’s muscle), into the superior border of a tarsal plate of the upper eyelid.

Levator Palpebrae Superioris Muscle Nerve supply

• The larger part of skeletal muscle, by the oculomotor nerve
• A smaller part of smooth muscle, by sympathetic fibres derived from superior cervical sympathetic ganglion

Levator Palpebrae Superioris Muscle Action: Elevation of the upper eyelid to open the eye.