What is the name of the muscle that covers the top of the head?

The muscle that covers the top of the head is known as the epicranius. The epicranius is a large muscle that extends from the forehead to the back of the skull and includes two main parts: the frontalis and the occipitalis. The frontalis is responsible for raising the eyebrows and wrinkling the forehead, while the occipitalis is located at the back of the head and contributes to the movement of the scalp. The epicranius functions as a single unit to allow for the movement of the scalp and forehead, playing a significant role in facial expressions.

In contrast, the frontalis refers specifically to the muscle at the forehead, while the occipitalis is the muscle at the back of the head. The temporalis muscle, on the other hand, is primarily involved in the movement of the jaw and does not cover the top of the head. Thus, selecting the epicranius recognizes its comprehensive role as the muscle enveloping the top of the head, integrating both the frontalis and occipitalis components.