The muscle type responsible for body movements is skeletal muscle. This type of muscle is under voluntary control (unlike cardiac and smooth muscle) meaning that we can consciously control the movements we make.The specific skeletal muscle responsible for movement will depend on what movement is being made.hat being said, the prime mover responsible for scapular depression is the trapezius (specifically the lower fibers). Other muscles which act as stabilizers or synergists in scapular depression and eventual scapular protraction are the subscapularis, the serratus anterior and the lower fibers of latissimus dorsi.