Fig. 8
Examples of recordings of fEPSPs and PS evoked by three representative frequencies of stimulation in a DH and a VH slice. Traces were obtained before and during application of the blocker of GABAA receptor channel picrotoxin (open and filled symbols respectively). Stimulation intensity was adjusted to produce a suprathreshold fEPSP that induced a PS of 0.5–1 mV amplitude. Single traces on the left of first PS and fEPSP traces (i.e. in the 10 Hz example) in each panel represent the first response of the 0.1 Hz train with which each frequency stimulation experimental procedure started; time calibration bars, 5 ms. Amplitude calibration bar for all records, 1 mV. Stimulation artifacts are truncated for clarity