ANATOMY

Detailed explanation-1: -The sternocleidomastoid muscle is one of the largest and most superficial cervical muscles. The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. The sternocleidomastoid is innervated by the accessory nerve .

Detailed explanation-2: -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-3: -Function. Rotation of the head to the opposite side or obliquely rotate the head. It also flexes the neck. When acting together it flexes the neck and extends the head.

Detailed explanation-4: -Sternocleidomastoid is the most superficial and largest muscle in the front portion of the neck. It is also known as SCM or Sternomastoid or Sterno muscle. The name has the origin of the Latin words: sternon = chest; cleido = clavicle and the Greek words: mastos = breast and eidos = shape, form.

Detailed explanation-5: -Function. A unilateral contraction of the sternocleidomastoid muscle flexes the cervical vertebral column to the same side (lateral flexion) and rotates the head to the opposite side.