Análise de filtros espaciais em sinais EMG de superfície nas condições do Máximo volume de Contração

Abstract

Nowadays the surface EMG measurement and its signal analysis have combined two important techniques in order to improve the signal resolution and better investigate single motor units: measurements configurations with smaller pick-up areas and application of the spatial filtering to electromyography. Smaller pick-up areas can be achieved through multielectrode arrays and multichannel recording, making possible the detection of correlated excitations at different sites of the muscle. Spatial filters combine the information of several electrodes to form one output signal channel. This work aims at evaluating the EMG signals measured from some subjects with a linear array of 16 electrodes and compare their resolution through the application of Bipolar, Longitudinal Double Diferentiating and Longitudinal Quadruple Diferentiating spatial filters. © Springer-Verlag Berlin Heidelberg 2007.