Figure 2.

A sub-population of non-grid cells exhibit pronounced spatial periodicity in 1D VR environments. Examples of co-recorded non-grid periodic cells from two animals (A, 10 cells from mouse m3504: B, five cells from mouse 3193) shown as ratemaps in both VR (top row) and RW (bottom rows). In VR, the firing rate of cells is plotted against position in each environment (A–C) with the periodicity of repeating cues indicated in the background (gray and orange). In RW the ratemaps of the same color-coded cells in VR are shown together with mean and peak firing rate, grid score, stability, and spatial information. Despite the regularity of the firing pattern patterns in VR, these cells neither showed clear grid-like firing pattern nor spatial firing of any kind in RW.