Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The occipitofrontalis or epicranius is a muscle which covers parts of the skull. It consists of two parts or bellies: The occipital belly, near the occipital bone, and the frontal belly, near the frontal bone. Some sources consider the occipitofrontalis to be a structure consisting of two distinct muscles, the Frontalis and the occipitalis. However, Terminologia Anatomica currently classifies it as a single muscle.