Relationship of magnitude of electromyogram of the lumbar muscles to static posture

This work reports research that investigated the relationship of the strength of contraction of different muscles of the lumbar back to maintain static posture. The paper reports the study of surface electromyogram of the muscles and uses scattering and neural networks on the strength of the EMG measured using root mean square (RMS). The signal is studied before and after the removal of electrocardiogram (ECG) artifact from the signal using a modified independent component analysis technique. The three dimensional scattering plots do not show any observable trends while the neural networks before the removal of ECG does not converge while after removal of ECG the neural network shows a high level of accuracy. The results demonstrate that there is a complex relation between the four EMG and posture and this relationship is revealed only after of ECG from EMG.