Action:

Depresses mandible, pulls down lower lip, tenses neck skin

Action:

Contracts individually around the eye

(blinking, winking, squinting)

Action:

Closes jaws by elevating mandible

Action:

Retraction of the mandible

Action:

Open mouth, depress mandible, elevate hyoid bone

Action:

Elevates hyoid bone & floor of mouth, enabling tongue to exert upper & backward pressure

Action:

Elevate, depress and rotate scapula

Action:

Prime mover to protract scapula, abduction & raising of arm (punching)

Action:

Abduction of arm, stabilizes shoulder

Action:

Rotates humerus laterally, stabilizes shoulder

Action:

Elevates rib cage during inhalation

Action:

Depress rib cage during exhaltion

Action:

Aids in flexion of the vertebral column, trunk rotation

Action:

Aids in flexion of the vertebral column, trunk rotation

Action:

Compresses abdomen

Action:

Agonist of inspiration, flattens to increase thoracic volume

Action:

Flexor of wrist and middle phalanges

Action:

Wrist flexion, abduction of hand

Action:

Synergist in forearm flexion

Action:

Pronates forearm

Action:

Supinates forearm

Action:

Extends & abducts wrist

Action:

Agonist of finger extension, abducts fingers, extends wrist

Action:

Extends and stabilizes knee

Action:

Extends knee, stabilizes the patella

Action:

Synergist of hamstrings in extension;

adducts, medially rotates and flexes thigh

Action:

Adducts, flexes and medially rotates the thigh

Action:

Thigh extension, knee flexion, medial leg rotation

Action:

Extends thigh, flexes knee, medial rotation of leg

Action:

Plantar flexion