1.
Muscle Name: Platysma
Origin: Fascia over the deltoid and pectoralis major muscles
Insertion: Mandible
Action: Depresses the mandible and lower lip, tenses the skin of the neck
2.
Muscle Name: Mentalis
Origin: Mandible
Insertion: Skin of the chin
Action: Elevates and protrudes the lower lip
3.
Muscle Name: Orbicularis oris
Origin: Maxilla and mandible
Insertion: Skin around the lips
Action: Closes and protrudes the lips
4.
Muscle Name: Corrugator supercilii
Origin: Frontal bone at the medial portion of the superciliary arch
Insertion: Skin of the eyebrow
Action: Draws the eyebrows downward and medially, creating vertical wrinkles in the forehead
5.
Muscle Name: Orbicularis Oculi
Origin: medial orbital margin
Insertion: circular path around orbit
Action: Closes the eye
6.
Muscle Name: Occipitofrontalis
Origin: Epicranial aponeurosis
Insertion: Skin superior to supraorbital margin
Action: Raises the eyebrows, wrinkles the forehead, and moves the scalp backward