What is a sternocleidomastoid flap?
The sternocleidomastoid myocutaneous flap has several applications for reconstruction of defects about the head and neck. It is used for augmentation of facial defects, carotid artery protection, and repair of oral cavity defects. The procedure is modified by removing the epithelium on the tunneled portion of the flap.
What movement does the sternocleidomastoid produce?
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.
What is the main function of the sternocleidomastoid?
It is a long, bilateral muscle of the neck, which functions to flex the neck both laterally and anteriorly, as well as rotate the head contralaterally to the side of contraction.
What is the insertion of sternocleidomastoid?
Sternocleidomastoid Attachments
| Origin | Insertion |
|---|---|
| Upper part of the anterior surface of manubrium | Lateral surface of mastoid process |
| Superior border/anterior surface of medial third of clavicle | Nuchal line of occipital bone |
What is the role of the sternocleidomastoid in respiration during exercise?
The sternocleidomastoid muscle (SCM), which is responsible for the mechanical action in the majority of the head movements, is also considered an accessory muscle for respiration.
What Innervates the sternocleidomastoid?
Motor Function. The spinal accessory nerve innervates two muscles – the sternocleidomastoid and trapezius. Attachments – Runs from the mastoid process of the temporal bone to the manubrium (sternal head) and the medial third of the clavicle (clavicular head).
What is the origin insertion and action of sternocleidomastoid?
It is a ‘two headed’ muscle, meaning it has two origin sites and one insertion site. The SCM’s origins are the sternum and clavicle and its insertion is the mastoid process behind the ear. The actions of the SCM are to flex and rotate the head. It does this by contracting both SCMs together or one alone, respectively.
How are flaps controlled?
Instead of simply folding down from the wing, slotted flaps allow a small opening between the flap and the rest of the wing. Depending on the type of aircraft, the flaps run on racks or rails in a series controlled by the pilot. Fowler flaps sometimes also have slots, and are known as slotted Fowler flaps.
What muscle is the antagonist to the sternocleidomastoid?
Not Medical Advice: The antagonist muscle of the sternocleidomastoid (SCM) is the ‘splenius capitis’. The splenius capitis muscle connects back of the skull to the neck vertebrae.
What is the insertion of sternocleidomastoid muscle?
Insertion of the Sternocleidomastoid Muscle or SCM. One prominent muscle in the neck is the sternocleidomastoid, or SCM, for short. This muscle runs diagonally from your skull (from the mastoid process, which is a little projection of bone located behind your ear at the bottom) to your breastbone and collarbone.
What is mastoid muscle?
The mastoid part has a rough outer surface that gives rise to the occipital belly of occipitofrontalis muscle, which covers the skull from the superior nuchal line to the mastoid process. This muscle is innervated by the posterior auricular branch of the facial nerve (cranial nerve VII).