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Crosstalk reduction in epimysial EMG recordings from transhumeral amputees with PCA

By Kirstin Ahmed

When filtering multi-channel EMG recordings, it is important to distinguish between correlations caused by crosstalk versus co-activation of muscles. Ideally, we wish to remove the crosstalk component from the signal. Under the assumption that impedance in volume conductors is resistive, we can use principal component analysis to separate crosstalk from co-activation for multi-channel EMG recordings in surface electrodes.