Figure 3.

The effect of Cs⁺. Top, Voltage pulse protocol. Bottom, Whole-cell current traces (superimposed) recorded from a flexor cell in the absence (−Cs⁺) and in the presence (+Cs⁺) of Cs⁺ added to the bath to a final concentration of 10 mm. Note the contrast between the inward current block at −140 mV and the lack of any effect on the outward current at 60 mV (except of the initial phase, representing the different contributions of the “tail currents” resulting from the preceding pulse). Solutions: bath (c)/pipette (f).