The muscles of the back are divided into superficial muscles and deep muscles. This video gives a detailed anatomy of superficial back muscles, their origins, insertion and actions. 0:00 difference between superficial and deep muscles of the back 1:51 trapezius 3:00 it's function 3:49 innervation 5:05 levator scapulae muscle 5:32 rhomboid minor 5:55 rhomboid major 6:22 innervation 7:00 latissimus dorsi 7:35 action 8:02 innervation