Firing rate of BLA neurons during Phases 4 (A) and 5 (B-D). Panels A
to D show the activity of four different neurons. Left column (1), graphs
plotting firing rate (y-axis) as a function of time (x-axis, 10 s bins). Black
* and red symbols indicate data obtained in W and SWS, respectively.
The vertical line marks a 3.5 min interruption when the tone (A) or tone
plus foot-shock (B-D) were presented. Right column (2), histograms
showing averaged firing rates in W (black) and SWS (red), pre- (left)
and post-tone (right).