1. Platysma
Origin: Deep fascia of the upper part of the thorax (covering pectoralis major and deltoid)
Insertion: Lower border of mandible
Action: Depression of the mandible
2. Mentalis
Origin: Incisive fossa of mandible
Insertion: Subcutaneous tissue of chin
Action: Elevates and protrudes lower lip (allows pouting)
3. Orbicularis Oris
Origin: Maxilla and mandible
Insertion: Skin and muscle around lip or mouth
Action: Pursing or puckering of the lips and shapes lips in speech
4. Corrugator Supercilii
Origin: Medial part of the supraorbital margin
Insertion: Skin underlying the eyebrow
Action: Wrinkling of the bridge of nose (frowning)
5. Orbicularis Oculi
Origin: Frontal bone of maxilla
Insertion: Tissue around the eyes, upper and lower eyelids
Action: Blinking and closing eyes
6. Occipitofrontalis (Frontal Belly)
Origin: Epicranial Frontalis
Insertion: Skin superior to supraorbital margin
Action: Raises eyebrows and wrinkles forehead skin