|
Name |
Origin |
Insertion |
Action |
|
|
|
Platysma |
Fascia over deltoid and pectoralis major muscles |
Mandible, blends with muscles around angle of mouth, and skin of lower face |
Draws outer part of lower lip inferiorly and posteriorly – pouting; depresses mandible |
|
|
Mentalis |
Mandible |
Skin of the chin |
Elevates and protrudes the lower lip and pulls the skin up – pouting |
|
|
Orbicularis oris |
Muscle fibers around the mouth |
Skin at the corner of the mouth |
Closes and protrudes lips – kissing, compresses lips, and shapes lips during speech |
|
|
Corrugator supercilii |
Medial end of superciliary arch of frontal bone |
Skin of eyebrow |
Draws eyebrow inferiorly and wrinkles the skin of the forehead vertically – frowning. |
|
|
Orbicularis oculi |
Medial wall of orbit |
Circular path around orbit |
Blinks and closes eye |
|
|
Frontal belly |
Epicranial aponeurosis |
Skin superior to supraorbital margin |
Draws scalp anteriorly, raises eyebrows, and wrinkles forehead horizontally – surprised expression |
Tortora, G. J., & Derrickson, B. (1975). Principles of Anatomy & Physiology. http://ndl.ethernet.edu.et/bitstream/123456789/1717/1/36%2c2012.pdf.pdf