What is the name of the muscle that extends from the collarbone to the temporal bone behind the ear and rotates and bends the head?

The muscle that extends from the collarbone to the temporal bone behind the ear, which facilitates the rotation and bending of the head, is known as the Sterno-Cleido-Mastoid. This muscle is critical in performing various head movements, including lateral flexion and rotation, as well as helping to stabilize the head and neck.

It originates from two key points: the sternum and the clavicle, hence its name, and it inserts at the mastoid process of the temporal bone. When one side of the muscle contracts, it rotates the head towards the opposite side, and when both sides contract together, they work to flex the neck and bring the head forward.

Understanding the function and location of this muscle is fundamental in fields related to anatomy, massage, and esthetics, particularly when considering techniques that involve neck and upper body treatments. The other muscles listed either do not have the same function or do not connect the same points on the body, making them unsuitable for this specific action.