Because Figures 5C,D were obtained by averaging power time series with potentially very different absolute values, a single high power session or subject could dominate the average. To address this, we examined the spatial distribution of low and high gamma power for each rat individually. Shown in Figure 6 are the spatial distributions over the linearized track, with values for each session z-scored against their distribution over space. Different rats showed a similar modulation consistent with the average in Figures 5C,D, with gamma-50 increasing after the reward sites, and gamma-80 ramping up before them. Thus, although absolute power levels could differ between animals, differential modulation of gamma-50 and gamma-80 was consistently observed across subjects.
