Texas Esthetician License Practice Exam

Which muscle extends along the side of the neck from the ear to the collarbone?

1. Trapezius

2. Sternocleidomastoid

3. Scalene

4. Platysma

The correct answer is: Sternocleidomastoid

The muscle that extends along the side of the neck from the ear to the collarbone is the sternocleidomastoid. This muscle plays a crucial role in head movement and is responsible for the rotation and flexion of the neck. It originates from the sternum and the clavicle and inserts behind the ear at the mastoid process of the temporal bone. When one side of this muscle contracts, it causes the head to turn to the opposite side, while contraction of both sides together flexes the neck forward. Understanding the placement and function of the sternocleidomastoid is essential for estheticians, particularly when considering the anatomical structures involved in facial treatments and massages. This knowledge assists in promoting relaxation and addressing muscle tension in clients. The trapezius muscle, while located in the upper back and neck area, has a more extensive range of attachment points and does not specifically span from the ear to the collarbone like the sternocleidomastoid. The scalene muscles are situated laterally in the neck but are mainly involved in the lateral flexion of the neck and aiding in respiration, rather than extending from the ear to the collarbone directly. The platysma is a superficial muscle that covers the front of the neck