A local measure of symmetry and orientation for individual spikes of grid cells
Fig 5
Classifying grid cells with the spike-based and the correlogram-based grid score.
a) Venn diagram of 619 recordings from cells in mEC. Different colors highlight areas with different classification results (classification by Ψ and/or ρ score positive/negative). See text for a description of the classification method. b) Correlation of Ψ and ρ score as in Fig 3e. Markers represent the classification of the cell using the color code and the symbols from a. c, d, e, f, g) Individual recordings in different classification categories. The category is indicated by the marker on the left, using the scheme in a. From left to right: spike map with each spike k color-coded with its grid score (global Ψ score shown above); smoothed spike density (“rate map”), brighter values indicate higher density of spikes; autocorrelogram of the rate map (ρ score shown above); smoothed histogram of pairwise distances of all spikes, dashed orange lines show automatically detected neighborhood shells. See text for a detailed description of all examples. Experimental data recorded and made publicly available by Sargolini et al. [6] through [16].