Figure 2. IPSPs evoked by stimulation of the lateral funiculi were mediated by GABA.

A, superimposed voltage-clamp records of IPSCs evoked by stimulation of the iLF in the presence of NBQX and D-APV. IPSCs were progressively reduced in the presence of increasing concentrations of bicuculline (V_h − 45 mV). B, corresponding whole-cell current-clamp recording (V_m − 50 mV) showing IPSPs which were insensitive to strychnine, but completely and reversibly abolished by bicuculline. C, stimulation of the cLF evoked IPSCs which were reduced in the presence of strychnine and completely abolished by subsequent addition of bicuculline (V_h − 45 mV). Each record is the average of 8 consecutive responses.