1. Platysma
Origin: the skin and fascia of the infraclavicular and supracalivicular regions
Insertion: the base of the mandible, skin of the cheek and lower lip, angle of the mouth, and the orbicularis oris muscle
Action: draws the corners of the mouth downwards, tenses the skin of the neck, depresses the lower jaw
2. Mentalis
Origin: the anterior aspect of the mandible
Insertion: underneath skin of chin
Action: elevates and protrudes lower lip and skin of the chin
3. Orbicularis oris
Origin: the maxillia and other muscles of the cheek
Insertion: into the skin and mucous membranes of the lips
Action: purses the lips
4. Corrugator supercilii
Origin: the superciliary arch, running in a superolateral direction
Insertion: into the skin of the eyebrow
Action: draw eyebrows together, creating vertical wrinkles on the bridge of the nose
5. Orbicularis oculi
Origin: the medial orbital margin, the medial palpebral ligament, and the lacrimal bone
Insertion: into the skin around the margin of the orbit, and the superior and inferior tarsal plates
Action: closes the eyelids (palpebral part), drainage of tears (lacrimal part), and tightly closes the eyelids (orbital part)
6. Occipitofrontalis (frontal belly of epicranius)
Origin: the epicranial aponeurosis
Insertion: into the fascia of the facial muscles
Action: raises the eyebrows and wrinkles the forehead