all about upper lid raiser – PREVIEW

AU5 - upper lid raiser - Facial Action Coding System - levator palpebrae superioris - before vs. after

what is upper lid raiser?

AU5 - upper lid raiser - Facial Action Coding System - levator palpebrae superioris - before vs. after
In FACS, upper lid raiser, or AU5, is the action that raises and retracts the upper eyelid; this movement causes the eyes to appear wider and reveal more sclera (the white part of eye).
AU 5 - GIF

anatomy & etymology

anatomy

The appearance changes we see in upper lid raiser are the result of an increase in contraction of levator palpebrae superioris, an extraocular muscle that works to keep the upper eyelid elevated.

extraocular muscle: ocular muscles that control the external movements of the eyes

intraocular muscles: ocular muscles that control the internal movements of the eyes, e.g. pupillary reactions to lighting changes
Levator palpebrae superioris is made up of skeletal muscle fibers but works closely with a small slip of muscle containing smooth fibers. (This bit of info will come in handy when we get to the “function” section.) Smooth muscles are involuntary and work without conscious awareness. Skeletal muscles, on the other hand, are voluntary and can be consciously controlled.

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etymology

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upper lid raiser function

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upper lid raiser in emotions & states

emotions

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states

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upper lid raiser on different eyelid types

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common mistakes artists make with upper lid raiser

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interesting cases & rare conditions of upper lid raiser

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final thoughts

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