Muscle Charts PDF
Muscle Charts PDF
Muscle Charts PDF
Muscles that act on the Jaw (for mastication and facial expression)
ACTION ORIGIN INSERTION
Elevates mandible (as in closing Zygomatic arch and Mandible ramus and
Masseter
mouth while chewing) bone angle
Temporal, frontal, Coronoid process of
Temporalis Elevates mandible
parietal bones mandible
Pulls lower lip down (as in
frowning)
Mandible, skin of lower
Platysma Depresses mandible (opening Pectoralis muscle
face
mouth as when chewing or
surprised)
Rotator Cuff Muscles (ALL these small muscles help to keep head of
humerus snug in glenoid fossa)
ACTION ORIGIN INSERTION
Flexes hip (as in lifting leg Vertebral bodies T12 Lesser trochanter of
Psoas major
to place on stair) to L5 femur