Fig. 1From: Understanding regional activation of thoraco-lumbar muscles in chronic low back pain and its relationship to clinically relevant domainsExperimental setup. The picture depicts the positioning of the HDEMG grids over the thoraco-lumbar extensor muscles in relation to the spine and the muscle mass. L5 location was identified through palpation and marked on the skin. Two grids of 32 surface electrodes were positioned one of each side of the spine. Each grid was placed 2–3,5 cm lateral to the spinous processesBack to article page