|
Muscle |
Origin |
Insertion |
Action |
|
1. Platysma |
Fascia over deltoid and Pectoralis major muscle |
Mandible |
Pulls outer part of lower lip inferiorly and posteriorly, Depresses mandible |
|
2. Mentalis |
Mandible (Incisive fossa) |
Skin of chin |
Elevate & Protrudes lower lip and skin of the chin |
|
3. Orbicularis oris |
Muscle fibers surrounding opening of mouth |
Skin at corner of mouth |
Compress, Purse lips, Shaping of lips (When speaking) |
|
4. Corrugator supercilli |
Medial end of superciliary arch |
Skin of eyebrow |
Draws eyebrows medially and downward (Frown) |
|
5. Orbicularis oculi |
Medial wall of orbit |
Circular path around eyelids |
Close eyes, blink, wink |
|
6. Occipitofrontalis |
Epicranial aponeurosis |
Skin superior to supraorbital margin |
Raises the eyebrows, wrinkles the forehead horizontally |
Tortora, G. J. (2018, May 15). Principles of anatomy and physiology. Google Books.
https://books.google.com/books/about/Principles_of_Anatomy_and_Physiology.html?id=aSaVDwAAQBAJ