|
MUSCLE |
ORIGIN |
INSERTION |
ACTION |
|
Fascia over deltoid and pectoralis major muscles. |
Mandible, blends with muscles around the angle of mouth, and skin of lower face. |
Draws outer part of lower lip inferiorly and posteriorly as in pouting; depresses mandible. |
|
Mandible. |
Skin of chin. |
Elevate and protrude lower lip and pull skin of chin up, as in pouting. |
|
Muscle fibers surrounding opening of mouth |
Skin at the corner of mouth. |
Closes and protrudes lips, as in kissing; compresses lips against teeth; and shapes lips during speech. |
|
Medial end of superciliary arch of frontal bone. |
Skin of eyebrow. |
Draw eyebrows inferiorly and wrinkles skin of forehead vertically as in frowning. |
|
Medial wall of orbit. |
Circular path around orbit. |
Closes eye. |
|
Epicranial aponeurosis. |
Skin superior to supraorbital margin. |
Draws scalp anteriorly, raises eyebrows, and wrinkles skin of forehead horizontally as in look of surprise. |
Reference:
Tortora, & Derrickson. (2012). Chapter 11: The Muscular System. In Principles of anatomy and physiology (13th ed.).