Figure 3.

Variability of phase precession. We considered variability of the measures phase-position correlation (A), phase offset (B), slope (C), and phase range (D) for single trials (A1–D1) and pooled trials (A2–D2). Insets in A1–D1 show an example single trial (same as in Fig. 1, column 3, row 4) with the corresponding values of the measures. Note that considerable variability exists in all four measures. Positive slopes fitted to single trials (C1) can be attributable to bimodal phase distributions (Kjelstrup et al., 2008) (supplemental Fig. 1, available at www.jneurosci.org as supplemental material). A3–D3, Trial-to-trial variability within randomly selected example place fields. Single-trial values of the four measures (black bars) are shown for 60 place fields (rat 1, place field index 1–20; rat 2, 21–40; rat 3, 41–60). Large variability exists within a given place field, whereas the variability of pooled-trial values (gray circles) is comparatively small across place fields.