Figure 10.

Comparison of phase precession relative to ventral striatal and hippocampal theta signals. Units with a significant space–phase correlation (“phase precessing units”) had a faster theta modulation in their spiking compared with the frequency of both the ventral striatal (A) and hippocampal (B) reference signal. Phase precession strength tended to be stronger relative to the hippocampal, compared with ventral striatal, reference signal (C), this was true even when only cells that phase precessed to both the hippocampal and ventral striatal theta rhythm were considered (D).