Scalene Muscles: Location and Actions

The scalene muscles are three paired muscles of the neck, located in the front on either side of the throat, just lateral to the sternocleidomastoid. There is an anterior scalene (scalenus anterior), a medial scalene (scalenus medius), and a posterior scalene (scalenus posterior). They derive their name from the Greek word skalenos and the later Latin scalenus meaning “uneven”, similar to … Read more

Sternocleidomastoid Muscle: Location and Actions

The sternocleidomastoid (SCM) is a muscle of the neck so-named because it originates on the sternum (sterno) and the clavicle (cleido) and inserts on the mastoid process (mastoid) which is an easily located bony prominence behind the ear (The mastoid process also serves as an attachment for the posterior belly of the digastric, splenius capitis, and longissimus … Read more