💪 The Layers of Your Back Muscles: A Complex System 💪 Your back muscles are organized into several layers, each serving an important function. The outermost, or superficial layer, includes muscles like the trapezius and latissimus dorsi, which are responsible for moving the shoulders and arms. Beneath these are the intermediate and deep layers, such as the erector spinae and transversospinalis muscles, which play crucial roles in stabilizing the spine and maintaining posture. Together, these m