Corrugator

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Corrugator

Corrugator (/kɔːˈruːɡeɪtər/), also known as the Corrugator muscle, is a small, narrow, pyramidal muscle located at the medial end of the eyebrow. Its functions include pulling the eyebrows downward and medially, which causes vertical wrinkles in the skin of the mid-forehead. This muscle is also involved in the expression of frowning.

Etymology

The term "Corrugator" is derived from the Latin word 'corrugare' which means 'to wrinkle'. It is named for its function in creating wrinkles in the forehead.

Anatomy

The Corrugator muscle originates from the medial end of the frontal bone, and inserts into the skin above the middle of the orbital arch.

Function

The primary function of the Corrugator muscle is to pull the eyebrows downward and towards the nose, creating vertical wrinkles in the forehead. This action is often associated with facial expressions of concern, worry, or concentration.

Related Terms

  • Frontalis: The muscle that lies above the Corrugator muscle and is responsible for raising the eyebrows and wrinkles in the forehead.
  • Procerus: A small pyramidal slip of muscle deep to the superior orbital nerve, artery and vein.
  • Orbicularis oculi: A muscle in the face that closes the eyelids.

See Also

External links

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