What function does the corrugator muscle serve?

The corrugator muscle is primarily responsible for drawing the eyebrows down and together, which contributes to the action of frowning. This muscle is located at the medial end of the eyebrow and plays a critical role in facial expressions that convey emotions such as anger or concentration.

When the corrugator muscle contracts, it pulls the skin of the forehead downward and inward, resulting in the characteristic furrowed brow associated with frowning. This action helps to express emotions more effectively through facial movements and is significant in non-verbal communication.

Understanding the role of the corrugator muscle is essential for those studying skin and facial anatomy, as it highlights how muscle movements correspond with emotional expressions and can influence aesthetic outcomes in fields such as cosmetic treatment and dermatology.