ANATOMY

Detailed explanation-1: -Sternocleidomastoid : One of the largest muscles in the neck, helping you move your head, extend your neck and control your temporomandibular joint (in the jaw).

Detailed explanation-2: -The platysma is responsible for drawing the skin around the lower part of your mouth down or out, which creases the skin in your lower face, according to the Loyola University Medical Education Network.

Detailed explanation-3: -In the cervical spine, the erector spinae muscles play key roles in supporting posture, rotating the neck, and extending the neck backward. The suboccipital muscles are 4 pairs of small muscles that connect the top of the cervical spine with the base of the skull.

Detailed explanation-4: -Sternocleidomastoid muscle function The sternocleidomastoid muscle protects some of the deeper structures, including the carotid artery and jugular vein. It also rotates the head and allows for neck flexion. Plus, the SCM supports the head when you move it back and helps with chewing and swallowing.

Detailed explanation-5: -Dissimilar to other muscles of the body that lie deep to the subcutaneous tissue, the platysma is located within the subcutaneous tissue of the neck (superficial layer of the cervical fascia). Its superficial position means that surgical dissections of the neck must acknowledge the underlying neurovascular structures.