What bone does the occipitofrontalis or epicranius originates on?

The occipitofrontalis, or epicranius, originates from the frontal bone at the forehead and the occipital bone at the back of the skull. It consists of two muscle bellies—the frontal belly at the front and the occipital belly at the back—connected by an aponeurosis called the galea aponeurotica. This muscle plays a key role in facial expressions, particularly in raising the eyebrows and wrinkling the forehead.