What is corrugator supercilii?

The corrugator supercilii is a small muscle located on the forehead, just above the eyebrow. Its primary function is to pull the eyebrow downward and inward, causing a vertical furrowing of the brow. This can create a facial expression of anger, concentration, or confusion.

The corrugator supercilii is innervated by the facial nerve and receives its blood supply from the supratrochlear artery. It works in conjunction with other muscles of the brow and face, such as the frontalis and orbicularis oculi, to produce various facial expressions.

Overactivity of the corrugator supercilii muscle can lead to the formation of vertical lines between the eyebrows, commonly known as "frown lines" or "11 lines." These lines can be treated with cosmetic procedures such as Botox injections to temporarily relax the muscle and smooth out the skin.

Overall, the corrugator supercilii plays an important role in facial expression and can have a significant impact on a person's appearance and emotional communication.