Figure 8.

Stress enhances responses of weakly tuned dmPFC WS neurons. (a) Weak delay-related spiking activity is increased during stress. (ai) Raster and PETHs of an illustrative weakly tuned delay neuron. X-axes = time (seconds) before and after start of delay, Y-axes = spike probability, gray bar = delay interval (Inset = spike waveforms). (aii) Stress significantly increased weakly tuned responses of delay neurons for correct and error trials. (b) Reward responses and (c) pickup responses were also enhanced during stress. Left and right trial activity was combined for population analyses. Probabilities >1 indicate that on average the interval contained >1 spike/bin/trial. Bar graphs = mean ± SEM. **P < 0.01.