What is the broad muscle that covers the top of the skull called?

The broad muscle that covers the top of the skull is known as the epicranius. This muscle is significant because it plays a crucial role in facial expressions and movements of the scalp. The epicranius consists of two main parts: the frontalis, which is located at the front of the head and is responsible for raising the eyebrows and wrinkling the forehead, and the occipitalis, found at the back of the head, which helps to pull the scalp backward. Together, these two parts of the epicranius work in unison to allow for various movements and expressions.

Understanding the anatomy of the epicranius is essential in esthetics as it can influence the application of treatments and interventions related to skin and muscle tone in that area. Knowledge of this muscle's function also aids professionals in delivering more effective skincare and treatment processes, as well as understanding how the muscles interact during facial expressions.