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Changes in FRC elicited by artificial PICs. A1–A4, Bottom, ZAP. Top, Voltage (average of 3–4 records). Dashed line, Resting potential in control condition. B, Control FRC (thin solid line) and FRC with PIC. τPIC = 1 ms (thick solid line), 10 ms (dotted line), or 50 ms (dashed line). C, Amplification gain against frequency (ratio of FRC with PIC to control FRC). Same symbols as in B. Horizontal line indicates no amplification. Same motoneuron as in Figures 1 and 2.
