- Platysma
- Origin: Pectoral fascia over deltoid and pectoralis major
- Insertion: Mandible
- Action: Depresses mandible and tenses neck skin
- Origin: Mandible
- Insertion: Skin of chin/lower lip
- Action: Raises skin of chin and elevates, everts, and protrudes lower lip
- Origin: Muscle fibers surrounding opening of mouth
- Insertion: Skin at corner of mouth
- Action: Closes, protrudes, and compresses lips
- Origin: Medial end of superciliary arch of frontal bone
- Insertion: Skin of eyebrow above middle part of supraorbital margin
- Action: Moves eyebrow down and inward toward nose, creating wrinkles in lower forehead
- Origin: Medial wall of orbit
- Insertion: Circular path around orbit
- Action: Closes eyelids
- Origin: Epicranial aponeurosis
- Insertion: Skin superior to supraorbital margin
- Action: Lifts eyebrows, pulls scalp, creates horizontal lines on forehead forward.