Muscle Actions

Closes eyes as in blinking

• Orbicularis oculi

• Orbicularis oris

• Frontalis

• Zygomaticus major

• Masseter

Closes lips, protrudes lips as for kissing

• Orbicularis oculi

• Orbicularis oris

• Frontalis

• Zygomaticus major

• Masseter

Raises eyebrows and retracts scalp

• Orbicularis oculi

• Orbicularis oris

• Frontalis

• Zygomaticus major

• Masseter

Raises corner of mouth as when smiling and laughing

• Orbicularis oculi

• Orbicularis oris

• Frontalis

• Zygomaticus major

• Masseter

Elevates mandible

• Orbicularis oculi

• Orbicularis oris

• Frontalis

• Zygomaticus major

• Masseter

Flexes head and neck, rotates head to left or right

• Platysma

• Sternocleidomastoid

• Trapezius

• Pectoralis Major

• Deltoid

Draws angle of mouth downward as when pouting or expressing horror

• Platysma

• Sternocleidomastoid

• Trapezius

• Pectoralis Major

• Deltoid

Extends head; rotates, raises, and pulls scapula and shoulder

• Platysma

• Sternocleidomastoid

• Trapezius

• Pectoralis Major

• Deltoid

Flexes, adducts, and rotates arm medially

• Platysma

• Sternocleidomastoid

• Trapezius

• Pectoralis Major

• Deltoid

Abducts, extends, and flexes arm

• Platysma

• Sternocleidomastoid

• Trapezius

• Pectoralis Major

• Deltoid