A Three-hour Electromyographic Investigation of Generalised Spasms in a Tetraplegic Patient A Preliminary Report

Abstract

Summary: An electromyographic (EMG) investigation, over a three-hour period, of a tetraplegic patient was undertaken to reveal data about the contraction sequence of generalised spasms. Electrodes were placed on the intercostal space, abdominal wall and thigh to determine the site of origin of the spasm and sequence of muscle activation. The expanded recordings allowed assessment of the effects of patient position, patient movement, and physiotherapy. Each spasm began in the abdominal area, spread to the intercostal region and then to the thighs. The direct effect of patient position, patient movement, and physiotherapy on stretching the muscles is demonstrated with the resulting reduction in the intensity of the spasm as reflected in decreased amplitude of the EMG signal.