Final answer:
The occipitofrontalis muscle, consisting of the frontal and occipital bellies, is responsible for scalp and eyebrow movements and is connected by the epicranial aponeurosis.
Step-by-step explanation:
The occipitofrontalis muscle is composed of two parts: the frontal belly and the occipital belly. This muscle is responsible for moving the scalp and eyebrows. The frontal belly is located on the forehead, while the occipital belly is situated near the occipital bone on the posterior part of the skull. They are connected by the epicranial aponeurosis, sometimes referred to as the galea aponeurosis, linking the muscles beneath the scalp. The occipital bone, where the occipital belly of the muscle is located, forms the posterior part of the skull and has features such as the external occipital protuberance, which serves as an attachment site for some neck muscles. The muscle makes up a significant part of the scalp architecture, allowing for expressions such as raising eyebrows and moving the scalp.