This is the muscle, which raises the eyebrows. The frontalis works in conjunction with occipitalis, which is located at the other end of the scalp. When the frontalis is used to lift the eyebrows the fibers in the muscle will shorten making the forehead wrinkles. But when you relax the forehead the occipitalis contracts stretching the wrinkles. Toning these muscles will make the deep wrinkles soften.