Fig. 2From: Comparison of MRI cross-sectional area and functions of core muscles among asymptomatic individuals with and without lumbar intervertebral disc degenerationMagnetic resonance imaging of abdominal muscles and paraspinal muscles at L3–4 level. RA = Rectus abdominis; LAW = Lateral abdominal wall; QL = Quadratus lumborum; PM = Psoas majorBack to article page