Appendix 1—figure 1. Variable theta phase locking fails to account for the combination of population and single-cell results.

(A, B) Comparison of experimental and simulated data produced by a model with constant $d_{\theta }$ but variable theta phase noise. Plotting conventions as in Figure 7. The variable noise model does a good job at capturing the increase in theta trajectory lengths and phase precession slopes with running speed, but it does so at the cost of modest within-field changes in phase precession slopes and without capturing any of the increase in place field sizes. (C) Example phase precession clouds at low and high speeds for experimental and modeled place fields. Each column corresponds to a cell. The variable noise model introduces an atypically large amount of noise at low speeds as compared to the experimental data.