The platysma is a thin sheet of muscle positioned between the collar
bone and the
jaw, whose action is to depress the jaw.
The points of origin and insertion, and the action of the platysma are
tabulated below:
Origin |
Insertion |
Action |
Fascia over deltoid and pectoralis major muscles.
|
Mandible, muscles around angle of mouth, and skin of lower
face.
|
Draws outer part of lower lip downward and backward as in
pouting; depresses mandible.
|
|
This is one of the muscles of the head, neck, and face that is included
on the syllabus of many courses in Indian
Head Massage. As this is an increasingly popular therapy we have
added several revision pages that may be helpful to students of Indian
Head Massage. See for example, the page about Skeletal
Structures of the Head and Neck.
To view the location of the platysma
muscle, see the page about Facial
Muscles.
Note that this page consists of an interactive (rather than a simply
labelled) diagram, so you'll have to test yourself by guessing which
muscle is the platysma until
you find the correct label. It's a fun way to learn !
|
