ABSTRACT
The use of electromyography in the clinical diagnosis of problems related to the motor unit (anterior horn cell, peripheral nerve, neuromuscular junction, and peripheral muscle) and the principles of its use in diagnosis are well established. Over the past 10 years, there has been a gradual increase in the use of this diagnostic method in determining the way in which muscles are used in such areas as upper extremity function in the work-place, analysis of muscle use in ambulation, and the determination of the presence of fatigue with repetitive movement. The effect of muscle training and muscle use in sport activities, attempts at defining more appropriate, non-fatiguing methods of performing muscle function in disease processes, and evaluation of muscle function for use in prosthetic devices, have also been studied by electromyography (EMG).
