1. Muscle Name: Platysma
Origin: Fascia that covers the deltoid muscle and pectoralis major muscle
Insertion: Mandible
Action: It helps pull the lower lip down and depresses the mandible
2. Muscle Name: Depressor labii inferioris
Origin: Mandible
Insertion: Skin of the lower lip
Action: Depresses lower lip (pulled downwards) that can create frowning or sad expression
3. Muscle Name: Orbicularis Oris
Origin: Muscle fibers encircling the mouth's opening
Insertion: skin at the corner of mouth
Action: It closes, tightens, and brings the lips together which is used for kissing and speaking
4. Muscle Name: Corrugator supercilii
Origin: Medial end of superciliary arch of the frontal lobe
Insertion: Skin of the eyebrow
Action: It causes the eyebrows to move downward and creates vertical lines on the forehead
5. Muscle Name: Oribicularis oculi
Origin: Medial wall of orbit
Insertion: Circular path around orbit
Action: Closes the eyes
6. Muscle Name: Occipitofrontalis
Origin: Epicranial aponeurosis
Insertion: Skin superior to supraorbital margin
Action: It makes horizontal lines on the forehead, lifts the eyebrows, and moves the scalp ahead