The muscles of the back and neck are organized in multiple layers — each serving a specific function in movement and posture. This exploded 3D view separates and highlights key groups: The superficial muscles (like trapezius and latissimus dorsi) move the shoulders and spine The intermediate muscles (like rhomboids and serratus posterior) support scapular positioning The deep muscles (like the erector spinae, semispinalis, and multifidus) stabilize and extend the spine This animation offers a cl