The splenius muscles are broad and thin, getting their name from the Greek word splenium, meaning bandage. Capitus comes from the Latin word for head, caput which refers to the origin of the splenius capitus on the mastoid process and adjacent occipital bone of the skull, underneath the sternocleidomastoid. Cervicus derives from the Latin word cervix which pertains to the neck, referring to the splenius cervicus having its origin on the cervical spine. Bibliography item arnold not found.,Bibliography item simons not found.
Continue Reading » Splenius Capitus and Cervicis Muscles: Location, Actions, and Trigger Points
The digastric is a double muscle of the throat which is located under the chin, behind and below the corner of the jaw, immediately in front of the top of the sternocleidomastoid, one for each side of the jaw and neck. It gets its name from the Greek word for "two bellies". The Greek word dia means double and gaster means belly hence digastric meaning "two-bellied".Bibliography item arnold not found. The digastric is made up of an anterior and posterior belly. The anterior belly extends from the digastric fossa of the mandible and the posterior belly extends from the mastoid notch of the temporal bone. Both bellies then insert to the body of the hyoid bone via a fibrous loop over a common intermediate tendon between the two bellies.
Continue Reading » Digastric Muscle: Location, Actions and Trigger Points
The temporalis muscle is a large, thin fan-shaped muscle located in the side of the skull above and in front of the ear. It is a muscle of mastication and its role is similar to the masseter, which is to elevate the mandible (lower jaw) and so close the mouth. Although the masseter is the more powerful muscle the temporalis is an important chewing muscle. It starts at the temporal bone of the skull but passes all the way down beneath zygomatic arch (cheek bone), attaching to the mandible, enabling it to assist the masseter in closing the jaw but also to retract the mandible.
Continue Reading » Temporalis Muscle: Location, Action and Trigger Points
The trapezius is a three part (tripartite) muscle of the upper back extending from the base of the skull all the way to the lower thoracic spine and laterally from the clavicle to the entire length of the spine of the scapula. Together the two trapezii form a diamond or kite-shaped trapezoid from which the muscle derives its name.
Continue Reading » Trapezius Muscle: Location, Actions, and Trigger Points
The levator scapulae is a muscle located on each side of the neck, situated posteriorly1. It is named for its action in elevating or "lifting" the scapula and the word levator is the latin word for "to lift". This muscle is like the over-worked back-stage prop guy of the neck. Always in the shadow of the large sternocleidomastoid and hardly ever getting a moments rest.
Along with the trapezius, the levator scapulae works to shrug the shoulders by its raising of the medial margin of the scapula. If the scapula are fixed the muscles assist in cervical extension and if used alone flex the neck laterally to one side.
Continue Reading » Levator Scapulae Muscle: Location, Actions, and Trigger Points
The masseter is a jaw muscle that gets its name from the Greek work "to chew". It is the major muscle of mastication (chewing) of the human jaw and serves primarily to elevate the mandible (lower jaw) while the deep tissues help to protrude (protract) it forward. Although we rarely think of it, the mandible is the only bone of the skull that is actually moveable. The upper jaw is fixed. There is a lot of moving for the mandible to do, therefore, and the masseter is the primary worker. Located on each side of the face in the parotid1 region at the back of the jaw, these muscles are easily visible or palpable when you clench your jaw, as they contract strongly just in front of the lower ears.2
Continue Reading » Masseter Muscle: Location, Actions, and Trigger Points
By Eric Troy, Ground Up Strength
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 process1 (mastoid) which is an easily located bony prominence behind the ear. The muscles pass diagonally across the front and side of the neck beginning at the top of the sternum and ending behind the ear. This two sided muscle is large and ropy, making it the most prominent muscle visible at the front of the neck.
Continue Reading » Sternocleidomastoid Muscle: Location, Action and Trigger Points