muscle opens jaw when head is pulled back

originates in clavicle, sternum and ribs; inserts in upper humerus

penn-

used in winking and blinking

muscle is found over the shoulder

abdominal muscle whose fibers run across the abdomen

abdominal muscle which originates in 8 lower ribs and inserts in crest of ilium

originates in thoracic, lumbar and sacral vertebrae and crest of ilium; inserts in head of humerus

anterior upper arm

mid and low back