Corrugator

Corrugator is a small, narrow, pyramidal muscle located at the medial end of the eyebrow. Its function is to pull the eyebrows downward and medially, which causes vertical wrinkles in the skin of the forehead. It is the "frowning" muscle, and may be regarded either as a muscle of the nose or of the eyebrow.

Anatomy

The Corrugator muscle originates from the medial end of the superciliary arch; and its fibers pass upward and laterally, 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.

Function

The Corrugator draws the eyebrow downward and medially, producing the vertical wrinkles of the forehead. It is, therefore, the muscle of frowning. Its function is to pull the eyebrows downward and medially, which causes vertical wrinkles in the skin of the forehead.

Clinical significance

Overactivity of the Corrugator muscle can lead to deep wrinkles in the skin of the forehead. This can be treated with botulinum toxin (Botox), which paralyzes the muscle temporarily.

See also

• Facial muscles
• Forehead
• Wrinkle

References

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