Fig. 1.

Placements of electrode and microdialysis probes, depiction of stimulus parameters, and glutamate efflux during BLA stimulation. Locations of electrode tips (●) and linesrepresenting the active surface of microdialysis probes for all animals used in the study are illustrated. Electrode placement was ipsilateral to microdialysis probes in all experiments, but in different rats, placements were made randomly in either the left or right hemisphere.a, Electrode placements were confined to the basolateral amygdala complex. b, PFC probe placements were primarily in infralimbic/prelimbic regions of the medial PFC. c, NAc probe placements were along the border of the shell and medial core. d, BLA stimulation consisted of brief bursts of 50 μA current pulses over a period of 10 min. e, BLA stimulation significantly increased glutamate efflux in the PFC (F = 4.53; p < 0.01;n = 15). f, BLA stimulation also increased glutamate efflux in the NAc (F = 1.69;p < 0.05; n = 10).