Dorsal view, head to the right. The membranous thoracolumbar deep fascia (1) covers and compartmentalizes epaxial muscles and provides aponeuroses for hypaxial muscles. You must reflect thoracolumbar deep fascia to expose epaxial muscles.
Other visible muscles include: middle gluteal (2), external abdominal oblique (3), latissimus dorsi (4), trapezius (5), and the cervical part of cleidocephalicus (6).