@adjustin_la: T3–T6 make up a key portion of the thoracic spine responsible for posture, rib stability, and upper back movement. When these segments lose mobility, tension often builds between the shoulder blades and posture begins to break down. Supporting movement in this region can make a big difference for people who sit, train, or work at a desk. Save this for reference. #thoracicspine #posturehealth #upperbackpain #chiropracticcare #LAWellness