Figure 9.

Perievent spectrogram for cue onset. The spectrogram is aligned to the cue that indicates the beginning of the trial at time 0. a, Shows that after vehicle administration there is not an evident time-locked change in the power of the different spectral bands. This observation is confirmed in the baseline subtracted spectrogram (b). After rimonabant administration a slight increase in the low gamma band, particularly before the cue onset, is observed (c). The baseline subtracted spectrogram shows that there is a time-locked decrease around gamma-55 (d). e, Mean gamma-50 power z scores (n = 6); in this graph the time-locked reduction in gamma-50 is evident.