|
Muscle |
Origin |
Insertion |
Action |
|
1. Depressor anguli oris |
Oblique line and mental tubercle of mandible |
Modiolus at the angle of the mouth |
Depress corners of the mouth |
|
2. Mentalis |
Incisive fossa |
Lower lip |
Extends lower lip forward |
|
3. Orbicularis oris |
Maxilla, mandible, and modiolus at the angle of the mouth
|
Upper and lower lips |
Extends lips forward
|
|
4. Corrugator supercilii |
Supraorbital margin (medial aspect) |
Skin under the eyebrows |
Draws the eyebrows toward the top of the nose/each other |
|
5. Orbicularis oculi
|
Medial orbital margin and lacrimal sac |
Lateral palpebral raphe |
Winking |
|
6. Occipitofrontalis |
Epicranial aponeurosis
|
Skin of eyebrows |
Lifts eyebrows up |