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

The broad muscle that covers the top of the head is called the epicranius, or occipitofrontalis muscle. It consists of two main parts: the frontalis, which is located at the forehead, and the occipitalis, situated at the back of the head. This muscle plays a role in raising the eyebrows and moving the scalp. The epicranius is connected by a fibrous tissue layer known as the galea aponeurotica.