Sternocleidomastoid

Definition

The sternocleidomastoid is a major muscle in the neck that plays a vital role in head movement and stabilization. It extends from the sternum and clavicle to the mastoid process of the temporal bone.

Related terms

Mastoid Process: A bony protrusion located behind the ear that serves as an attachment point for neck muscles.

Cervical Vertebrae:

The seven vertebrae forming the upper part of the spine, supporting the neck and allowing for its range of motion.

Muscle Origin and Insertion: Origin refers to where a muscle begins (attached to a fixed bone), and insertion refers to where it ends (attached to a bone that moves during muscle contraction)