Ten patients from 11 to 19 years of age having idiopathic Scoliosis underwent electromyography of the paraspinal muscles using surface electrodes. The study was conducted with the patients both standing and hanging. In the standing position most of the patients had electrical silence on both the concave and convex side of the curvature. In the hanging position, 7 patients had asymmetrical activity on EMG and their Cobb angles improved much more than that of the patients who had electrical silence. An asymmetrical activity at thoracic curvature was observed with a preponderance of activity on the convex side. The electromyographic evaluation in hanging position for idiopathic scoliosis was more valuable.
