Effect of inter-electrode distance on frequency parameters of surface EMG during isometric contraction

A linear electrode array was used to investigate the relationship between inter-electrode distance (IED) and frequency content of the surface EMG during isometric contraction of the elbow flexor muscles. It is shown that mean and median frequencies decrease as IED is increased from 5mm to 15mm. No effect of joint angle was observed, but it was noted that the spectral parameters differ with muscle.