Corrugator supercilii muscle is a small, thin, and triangular shaped muscle located in the forehead region of the face. It is one of the muscles that make up the muscular system of the face and is responsible for the movement of the eyebrows.
Location
The corrugator supercilii muscle is located in the forehead, just above the eyebrows. It is situated between the skin and the bone, and is located deep to the frontalis muscle, which is a large muscle responsible for the movement of the forehead.
Structure
The corrugator supercilii muscle is a small, thin muscle with a triangular shape. It originates from the medial end of the superciliary arch, which is a bony ridge located above the eyebrows, and inserts into the skin of the forehead just above the eyebrows. The muscle is innervated by the temporal branch of the facial nerve (CN VII).
Function
The main function of the corrugator supercilii muscle is to pull the eyebrows downward and medially, creating wrinkles in the forehead and a scowling or worried expression. It is responsible for the movement of the eyebrows during expressions of anger, fear, or concern.
Clinical significance
The corrugator supercilii muscle is often the target of cosmetic procedures such as botox injections, which are used to reduce the appearance of wrinkles and frown lines in the forehead. Dysfunction of the corrugator supercilii muscle can also result in abnormal eyebrow movements or facial expressions, which may be caused by facial nerve damage or other neurological conditions.
