muscle opens jaw when head is pulled back

dorsal lower trunk muscle; extends the hip in walking

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

ventral leg muscle originating in iliac crest inserts in upper anterior tibia

tetan-

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