Two parts of the epicranius are the occipitalis and which other part?

The epicranius, also known as the occipitofrontalis muscle, is a large muscle that covers the upper part of the skull. It consists of two primary parts: the occipitalis at the back and the frontalis at the front. The frontalis muscle is responsible for raising the eyebrows and creating expressions of surprise or shock. This muscle works in concert with the occipitalis, which helps in retracting the scalp back.

In the context of the question, the occipitalis is specifically paired with the frontalis to form the epicranius. Understanding the functions and locations of these muscles is crucial in esthetics, especially when considering how they affect facial expressions and the overall appearance of the upper face.

While the temporalis muscle, occipital muscle, and parietalis muscle are all related to head and neck anatomy, they serve different purposes and are not part of the epicranius. The temporalis mainly functions in the movement of the jaw, and the parietalis is not a muscle but rather a term that refers to a region of the skull. Therefore, the frontalis is the correct counterpart of the occipitalis in the epicranius structure.