Figure 7.

The phase offset of phase precession became more synchronized among individual neurons after the first experience on novel track. a, b, Reconstructed theta sequences using the subset of place cells that possessed strong first-lap phase precession preserved the rapid development of theta sequences. Plots are the same as in Figures 2, 3, and 5. * c, Phase offset distribution of 139 place fields in lap 1 (first row, left), lap 2 (first row, middle), lap 6 (first row, right), lap 10 (second row, left), and lap 14 (second row, middle). Gray represents angles. Black represents scales of histogram. Red represents resultant vectors. Right (second row), Resultant vector length of phase offset of 139 stable place fields between different laps (red); firing rate control (green); place fields with strong phase precession (black). d, Left, Resultant vector length of phase offset of 531 place field pairs within recording sites (blue) and 2870 place field pairs between recording sites (black). Middle, Theta phase deviation from 89 recording sites (black) and the resultant vector length of the phase deviations (red) across laps. Right, Spike modulation depth of cells with stable place fields by theta oscillation. * and color scale as in Figure 2.