an observation of the datta study is that the learning group spent 180% more time in sws than did the control group during the post-trial sleep-recording session. this study shows that after spatial exploration activity, patterns of hippocampal place cells are reactivated during sws following the experiment. rats were run through a linear track using rewards on either end. the rats would then be placed in the track for 30 minutes to allow them to adjust (pre), then they ran the track with reward-based training for 30 minutes (run), and then they were allowed to rest for 30 minutes.