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Grand-averaged source strength waveforms. Grand-averaged waveforms of Change-P50m (A) and P50m (B). The mean peak latencies are indicated by arrows. Upward and downward deflections indicate the source strength of the current directing anterosuperior and posteroinferior, respectively. C), the mean location of the estimated dipole for Change-P50m and P50m superimposed on standard MR images.
