What is the muscle attachment behind the ear called?

The muscle attachment behind the ear is primarily associated with the sternocleidomastoid muscle and the posterior auricular muscle. The posterior auricular muscle, a small muscle located at the back of the ear, helps in moving the ear slightly backward. Additionally, the sternocleidomastoid muscle, which runs from the sternum and clavicle to the mastoid process behind the ear, plays a role in head movement and stabilization.