data not shown). We were concerned that strong mPFC theta-BLA fast gamma coupling could arise if the gamma recorded in the BLA was not locally generated. To address this caveat, we re-examined phase-locking of BLA multi-unit recordings to BLA fast gamma as well as to gamma in the vHPC and mPFC. 76% of significantly phase-locked multi-units (40% of multi-unit recordings, Bonferonni-corrected, p<.0125, Figure 7B) were phase-locked to the BLA (59% to the BLA alone, and 17% to the BLA and at least one other brain structure). Only 24% (8% of the total) were significantly phase-locked to another structure but not the BLA. These data confirm that BLA units are most strongly phase-locked to local BLA gamma, as one would expect for a locally generated oscillation.
