Fig. 4.

Isoproterenol significantly influences short-term dynamics of hippocampal output (PS) in the dorsal but not the ventral hippocampus. Short-term changes in PS were studied at a stimulation current intensity producing a PS of about 1 mV. Changes in PS are plotted as a function of stimulus number. The indication "ISO adjust" refers to the data collected under isoproterenol after adjusting conditioning PS to control levels. Graphs for the dorsal and the ventral hippocampus are displayed in left and right panels, respectively.