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A, Voltage protocol with conditioning train of EPSCs evoked at 100 Hz for 500 ms and mean stimulation-dependent currents ± nifedipine. B, Voltage protocol and evoked currents in three representative cells with or without conditioning stimulation ± nifedipine. GABAA and NMDA receptors were blocked by SR95531 and CPP. C, Current-voltage curves for stimulation-dependent currents during the downward ramp.
