Sternocleidomastoid
Anatomical Info
-
Position:
Anteroir -
Region:
Neck -
Plane:
Frontal
Muscle Characteristics:
-
Movements:
Flexion And Protraction -
Muscle Shape:
Parallel
Nerve:
Nerve
System
Spinal Plexus
Division
Trunk
Branch
Roots
Description
The sternocleidomastoid muscle (SCM) is a large, thin muscle located in the neck. It originates at the sternum (breastbone) and the clavicle (collarbone), and inserts into the mastoid process, a bony projection on the base of the skull. The sternocleidomastoid muscle is a paired muscle, meaning that there is one on each side of the neck.
The sternocleidomastoid muscle has several important functions in the head and neck. It helps to flex the neck and rotate the head to the opposite side, and also helps to extend the head and neck. It is also involved in respiration, as it helps to elevate the rib cage during inspiration.
The sternocleidomastoid muscle is innervated by the accessory nerve, which is a cranial nerve that controls the muscles of the head and neck. It is a voluntary muscle, meaning that it can be controlled voluntarily by the person.
In some cases, the sternocleidomastoid muscle may be surgically modified or altered to address certain medical conditions, such as problems with neck movement or instability of the cervical spine. It may also be used as a donor muscle for reconstructive surgery in the head and neck region.
Muscle Engaging Sports
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