The corrugator supercilii muscle is a small, narrow, pyramidal muscle of the face. It arises from the medial end of the superciliary arch; it inserts into the deep surface of the skin of the eyebrow.
It draws the eyebrow downward and medially, producing the vertical "frowning" wrinkles of the forehead. It may be thought as the principal muscle in the facial expression of suffering. It also shields the eyes from strong sunlight.
Structure
The corrugator supercilii muscle is located at the medial end of the eyebrow. Its fibers pass laterally and somewhat superiorly from its origin to its insertion.
Origin
It arises from bone at the medial extremity of the superciliary arch.
Function
The muscle acts in tandem with the orbicularis oculi muscle. The corrugator supercilii muscle acts upon the skin of the forehead superior to the middle of the supraorbital margin, just superior to the nose. to shield the eye from excessively bright sunlight.
Etymology
The name corrugator supercilii comes from Latin, and means wrinkler of the eyebrows.
Additional images
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File:Sobo 1909 261.png|Corrugator supercilii seen from the inside.
File:Sobo 1909 262.png
File:Sobo 1909 264.png
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File:Corrugator supercilii muscle animation small.gif|Position of corrugator supercilii muscle (red)
File:Gray134.png|Outer surface of frontal bone.
File: Gray379.png| Visible on upper portion of face.
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