What would happen if there were nerve damage to the sternocleidomastoid?
Interruption of the nerve supply to the sternocleidomastoid muscle results in an asymmetric neckline, while weakness of the trapezius muscle can produce a drooping shoulder, winged scapula, and a weakness of forward elevation of the shoulder.
What attaches to the sternocleidomastoid muscle?
The manubrium is part of the sternum and forms the anterior wall of the thoracic cage; it also serves as the attachment point for several muscles….Sternocleidomastoid Attachments.
| Origin | Insertion |
|---|---|
| Superior border/anterior surface of medial third of clavicle | Nuchal line of occipital bone |
Which structure is the sternocleidomastoid?
It is given the name sternocleidomastoid because it originates at the manubrium of the sternum (sterno-) and the clavicle (cleido-) and has an insertion at the mastoid process of the temporal bone of the skull….Sternocleidomastoid muscle.
| Sternocleidomastoid | |
|---|---|
| FMA | 13407 |
| Anatomical terms of muscle |
Are there lymph nodes on sternocleidomastoid?
Inflammation. Lymph node groups in the neck include the submandibular nodes within the submandibular triangle, the jugular chain of nodes located along the internal jugular vein, and the posterior-triangle nodes located between the sternocleidomastoid and trapezius musculature.
Where is the sternocleidomastoid located?
neck
The sternocleidomastoid is a superficially located neck muscle that plays an important role in tilting your head and turning your neck, as well as other things. It courses from the back of your head and attaches to your breastbone and collar bone.
What Innervates the Sternocleidomastoid?
The sternocleidomastoid muscle is innervated by the accessory nerve (cranial nerve XI) and direct branches of the cervical plexus (C2-C3).
