The depressor anguli oris muscle is attached to the lower jaw (mandible). It ends at the orbicularis oris, which is the ring-like muscle that encompasses the lips. It is attached at the edge of the ...

The depressor labii inferioris muscle is a four-sided facial muscle located in the jaw area that draws the lower lip down and to the side. Originating within the lower jaw — at an area called the ...

The depressor anguli oris is a facial muscle that allows a person to move the corners of their mouth, specifically downward. The muscle sits on either side of the mouth. Frowning involves activating ...