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A, example trace of one subject. Averages of 4 consecutive MN-SSEPs from the same subject, recorded before PASN20 (grey), and at different times after PASN20 (black). Horizontal line indicates P25 amplitude at baseline. B, group data of 10 subjects. Asterisks indicate times when P25 amplitude was significantly (P < 0.05) different from baseline. Data show mean ± s.d.
