Left obicularis oculi notice the corrugator muscle at the top

The Corrugator supercilii is a small, narrow, pyramidal muscle, placed at the medial end of the eyebrow, beneath the Frontalis and Orbicularis oculi. It arises from the medial end of the superciliary arch; and its fibers pass upward and lateralward, between the palpebral and orbital portions of the Orbicularis oculi, and are inserted into the deep surface of the skin, above the middle of the orbital arch. Eyebrows, as marked by the red line The eyebrow is a bony ridge above the eye, found in humans and other primates. ...

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