levator palpebri muscle
Quick Summary
The levator palpebrae superioris muscle is responsible for raising the upper eyelid. This muscle originates at the apex of the orbit and inserts into the upper eyelid, causing it to elevate when it contracts. The opening of the eye is a result of this muscle's contraction, working in conjunction with the relaxation of the orbicularis oculi muscle, which closes the lids.12
Impairment or underdevelopment of the levator palpebrae superioris muscle can lead to ptosis, a drooping of the upper eyelid. This can be congenital, meaning present at birth, or acquired later in life due to factors like aging, muscular diseases, or nerve damage. In severe cases, ptosis can obstruct vision and potentially lead to permanent vision loss if not addressed.3
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eyelidā¦of the lid-raising muscle, the levator of the upper lid. Impulses for closing come by way of the facial (seventh cranial) nerve, and for opening by way of the oculomotor (third cranial) nerve. The lid borders are kept lubricated by an oily secretion (called sebum) of the meibomian glands. Thisā¦
Read Moreā¦of the lid-raising muscle, the levator of the upper lid. Impulses for closing come by way of the facial (seventh cranial) nerve, and for opening by way of the oculomotor (third cranial) nerve. The lid borders are kept lubricated by an oily secretion (called sebum) of the meibomian glands. Thisā¦
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human eyeThe protective mechanismsā¦muscle and contraction of the levator palpebri of the upper lid; the smooth muscle of the upper lid, MĆ¼llerās muscle, or the superior palpebral muscle, also assists in widening the lid aperture. The lower lid does not possess a muscle corresponding to the levator of the upper lid, and theā¦
Read Moreā¦muscle and contraction of the levator palpebri of the upper lid; the smooth muscle of the upper lid, MĆ¼llerās muscle, or the superior palpebral muscle, also assists in widening the lid aperture. The lower lid does not possess a muscle corresponding to the levator of the upper lid, and theā¦
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