A novel method based on the extended infomax approach of independent
component analysis (ICA) is proposed for the single-trial estimation of
multi-channel pattern-reversal visual evoked potential (PVEP). The
clinical applications illustrate the encouraging performance of the
method. The number of trials needed is reduced to 3, but the estimated
VEP complex is clearer than that obtained by conventional ensemble
averaging with 50 trials. By analyzing the time course and spatial
pattern of the independent components (ICs) of the multi-channel PVEP,
one component is found to be reasonably related to the P100 peak
