Pattern of Asymmetry of Paraspinal Muscle Size in Adolescent Idiopathic Scoliosis Examined by Real-Time Ultrasound Imaging: PDF OnlyPattern of Asymmetry of Paraspinal Muscle Size in Adolescent Idiopathic Scoliosis Examined by Real-Time Ultrasound Imaging A Preliminary StudyKennelly, K. P. BPhty (Hons); Stokes, M. J. PhD, MCSP Author Information Department of Physiotherapy, University of Queensland, Australia. Dr. Stokes is currently affiliated with the Royal Hospital and Home, London, England. Spine: June 1993 - Volume 18 - Issue 7 - p 913-917 Buy Abstract The symmetry of lumbar multifidus size was examined in 20 patients with adolescent idiopathic scoliosis, aged 12–19 years. With the subject prone, bilateral real-time ultrasound images were obtained at the level of the 4th lumbar vertebra. Cross-sectional area and linear (horizontal and vertical) measurements were made using on-screen calipers. A pattern of asymmetry of lumbar multifidus cross-sectional area was shown to exist for the different curve types. The cross-sectional area was smaller (P < 0.0001) on the opposite side to the convexity of a primary thoracic curve, and on the convex side of a lumbar or thoracolumbar curve. The combined linear measurements (multiplied) correlated with cross-sectional area (r = 0.95) and could therefore be used for rapid clinical assessment of multifidus size. These preliminary findings provide a basis for further investigation of the role of the musculature in the pathogenesis of adolescent idiopathic scoliosis. © Lippincott-Raven Publishers.