Figure 5.

High-pass filtering of TA-CA1 synaptic efficacy by DA. (A) Examination of frequency-dependent modulation by DA, using extracellular field recordings. Pulses (100) of different stimulation frequencies, as indicated, were applied. Data were normalized to the baseline fEPSP amplitude prior to stimulation and each mean fEPSP amplitude during 100 pulse stimulation was plotted (from top to bottom; control: n = 5, 5, 7, 6, and 5, DA: n = 5, 5, 5, 5, and 5). (B) Same data as in A, but normalized to the baseline fEPSP amplitude before, instead of after, DA application.