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