Levator palpebrae superioris
Levator Palpebrae Superioris
The Levator Palpebrae Superioris (pronounced: leh-vay-tor pal-pee-bree soo-pee-ree-oris) is a muscle in the human body that primarily functions to elevate the upper eyelid. The term is derived from Latin, with "levator" meaning "lifter", "palpebrae" referring to "eyelid", and "superioris" indicating "upper".
Anatomy
The Levator Palpebrae Superioris originates from the lesser wing of the sphenoid, just above the optic canal. It descends forward to insert into the skin of the upper eyelid, as well as the superior tarsal plate. It is innervated by the superior division of the oculomotor nerve (CN III).
Function
The primary function of the Levator Palpebrae Superioris is to elevate the upper eyelid, enabling the opening of the eye. This muscle plays a crucial role in normal eye function, and any damage or paralysis can lead to ptosis, a condition characterized by drooping or falling of the upper eyelid.
Clinical Significance
Damage to the Levator Palpebrae Superioris or its nerve supply can result in ptosis. This can occur due to various reasons, including congenital anomalies, neurological conditions, or trauma. Treatment typically involves surgery to reattach or tighten the muscle.
Related Terms
- Blepharospasm: An abnormal, involuntary blinking or spasm of the eyelids.
- Blepharoplasty: A surgical procedure to repair droopy eyelids by removing excess skin, muscle and fat.
- Orbicularis Oculi: The muscle in the face that closes the eyelids.
External links
- Medical encyclopedia article on Levator palpebrae superioris
- Wikipedia's article - Levator palpebrae superioris
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