Fig. 3. Effects of DPDPE (1 μm) on excitatory postsynaptic currents (EPSCs) evoked by stimulating Aδ-fiber ( A ) and C fiber ( B ) or both Aδ- and C fiber EPSCs ( C ). ( A –C ) Averaged traces of five consecutive evoked EPSCs before ( left ), during ( middle ; where control EPSC on the left is superimposed for comparison), and after ( right ) the action of DPDPE. The EPSCs were evoked at 0.1 Hz. The intensities of the stimuli used in A –C were 56, 380, and 560 μA, respectively.