Anatomy Of The Sternocleidomastoid Muscle - Everything You Need To Know - Dr. Nabil Ebraheim скачать в хорошем качестве

Anatomy Of The Sternocleidomastoid Muscle - Everything You Need To Know - Dr. Nabil Ebraheim

Dr. Ebraheim’s educational animated video describes the anatomy of the sternocleidomastoid muscle in the neck. Follow me on twitter: https://twitter.com/#!/DrEbraheim_UTMC Find me on Instagram @OrthoInitiative Anatomy of the Sternocleidomastoid Muscle The sternocleidomastoid muscle (also known as sternomastoid) is one of the largest and most superficial cervical muscles located in the superficial layers on the side of the neck. The sternocleidomastoid muscle has two heads: the clavicular head and the sternal head. The sternal head of the sternocleidomastoid muscle arises from the manubrium sterni. The clavicular head of the sternocleidomastoid muscle arises from the medial portion of the clavicle. It is inserted into the lateral surface of the mastoid process of the temporal bone and lateral half of the superior nuchal line of the occipital bone. The spinal accessory nerve provides motor innervation to the sternocleidomastoid muscle and also to the trapezius muscle. The function of the sternocleidomastoid muscle is to tilt the head to the same side and rotate the head to the opposite side. Both parts of the muscle together tilt the head down. The sternocleidomastoid muscle divides the neck into a posterior triangle and an anterior triangle. Congenital muscular torticollis is a “packaging deformity” typically caused by contracture of the SCM. The infant holds his or her head tilted to one side and has difficulty turning the head due to a tight, shortened sternocleidomastoid muscle. Sternocleidomastoid muscle also plays a role in displacement of clavicle fractures. It pulls the proximal fragment up, and the distal fragment is displaced downwards by gravity and the weight of the arm.