FIELD: medicine. SUBSTANCE: method involves representing electromyograms as their envelopes, the electromyogram envelopes are arranged in the XYZ-coordinate system so that agonist muscle electromyograms envelopes are plotted on X-axis, electromyogram envelope of a muscle engaging in motion with some advance is plotted on the Y-axis, the resulting curve is plotted on the Z-axis by adding N to each dimension as a coefficient equal to a time unit that was spent for making the movement. Displacement of the involute sum curve in Y-axis direction is interpreted as leading in engagement into the motion earlier than the agonist and synergists of the muscle under study do, proving in this way pathogenetical importance of its initial shortening, requiring correction to be done. EFFECT: enhanced accuracy of diagnosis. 8 dwg
