Fig. 4: The theta-firing phase of place cells can discriminate between distinct place fields of the same unit. | Nature Communications

Fig. 4: The theta-firing phase of place cells can discriminate between distinct place fields of the same unit.

From: Integration of rate and phase codes by hippocampal cell-assemblies supports flexible encoding of spatiotemporal context

Fig. 4

a Example of unsupervised spike clustering based on the spike position for a unit with multiple place fields. The number of place fields present in the spike set was established with DBSCAN, a density-based spatial clustering algorithm. The cluster memberships resulting from DBSCAN were then fed to a Gaussian mixture model for the final step of the classification (see Supplementary Fig. 7 for a comparison between this and other methods for place field detection). b Rate-phase and respective marginal distributions of unit spikes color-coded according to their field of firing. The exemplary units changed their firing phase when active in different place fields (two-tailed Kruskal–Wallis nonparametric test for angular data, see Methods, p value reported in figure with no multiple-comparison adjustments). Gray dots are spikes fired out of the two tested place fields.

Back to article page