The frontalis is a muscle located in the forehead region of the human face. It is part of the epicranius muscle group and is responsible for raising the eyebrows and wrinkling the forehead. This muscle plays a key role in facial expressions, helping convey emotions such as surprise or concern. The frontalis works in conjunction with the occipitalis, another muscle in the epicranius group, to move the scalp. It is innervated by the facial nerve, which controls its movements. Understanding the function of the frontalis is important in fields like anatomy and cosmetic surgery.