windows; the lag at the peak of this cross-correlation indicates predominant theta directionality (Supplementary Experimental Procedures; Adhikari et al., 2010a; Likhtik et al., 2014). We observed that on trials with a greater probability of mPFC theta lead, there was an increase in BLA fast gamma power, while increased probability of BLA lead was associated with a drop in fast gamma power (Figure 7D). This relationship held true overall for the population by multiple linear regression (mPFC lead: p=5.2 × 10−5; BLA lead: p=.0011, MLR; data not shown). On a moment-to-moment basis, windows in which the BLA led had lower fast gamma power than windows in which the mPFC led (Figure 7E; p<.05, sign-rank).
