Which two parts constitute the epicranius?

The epicranius, also known as the occipitofrontalis muscle, is a large muscle that covers the top of the skull and consists of two primary parts: the frontalis and the occipitalis.

The frontalis muscle is located at the forehead and is responsible for raising the eyebrows and wrinkling the forehead. In contrast, the occipitalis muscle is situated at the back of the skull and helps to pull the scalp backwards. Together, these two muscles are connected by a fibrous tissue called the galea aponeurotica, which facilitates their coordinated movement and provides an important function in facial expressions.

Understanding the anatomy of the epicranius is crucial for esthetics professionals, as it plays a significant role in not only facial expressions but also in techniques related to skincare treatments and possible injections in that area to enhance aesthetics.