1. ORIGIN: Fascia overlying the pectoralis major and deltoid muscles
INSERTION: inferior border of the mandible and skin of lower face
ACTION: depression of the mandible & angle of the mouth
2. ORIGIN: Mandible
INSERTION: underneath skin of lower lip
ACTION: lowering lower lip
3. ORIGIN: Mandible
INSERTION: underneath skin of chin
ACTION: protrusion of lower lip
4. ORIGIN: Frontal bone
INSERTION: skin underneath eyebrow
ACTION: lowering eyebrows/frowning
5. ORIGIN: Medial bones composing the orbit
INSERTION: Circumference of orbit
ACTION: closing of eyelids
6. ORIGIN: Epicranial aponeurosis
INSERTION: underneath skin of forehead
ACTION: raising/furrowing brows