Figure 3. Effect of ±60 mV mm−1 applied electric fields on population spikes evoked by varying intensity oriens stimulation.
Top to bottom, orthodromic stimulus intensity was incrementally increased. At each orthodromic stimulus intensity, the effect of −60 mV mm−1 (middle) and +60 mV mm−1 (right) electric fields was determined. Note that no spontaneous activity was observed in this slice at these field strengths.