1. Muscle: Platysma
Origin: Pectoral fascia
Insertion: Inferior border of mandible and adjacent muscles
Action: Depresses mandible and tenses skin of neck
2. Muscle: Mentalis
Origin: Incisive fossa of mandible
Insertion: Subcutaneous tissue of chin
Action: Protrudes and elevates the lower lip
3. Muscle: Orbicularis oris
Origin: Modiolus of angulus oris and vermillion line
Insertion: Skin and fascia of lips
Action: Compresses and protrudes lips
4. Muscle: Corrugator supercili
Origin: Medial aspect of superciliary arch
Insertion: Skin above each eyebrow
Action: Draws two eyebrows to form facial wrinkles
5. Muscle: Orbicularis oculi
Origin: Frontal bone, maxilla, medial palpebral ligament, and lacrimal bone
Insertion: Lateral palpebral raphe
Action: Close the eyelids
6. Muscle: Occipitofrontalis
Origin: Frontal belly, skin of eyebrow
Insertion: Epicranial aponeurosis
Action: Elevates eyebrows, wrinkles skin of forehead