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. Author manuscript; available in PMC: 2016 Nov 4.
Published in final edited form as: Neuron. 2015 Nov 4;88(3):578–589. doi: 10.1016/j.neuron.2015.09.031

Figure 2. Characteristics of grid cells during treadmill running.

Figure 2

(A–B) Ensemble firing rate maps showing normalized spiking rate during treadmill running for grid cells (A) and non-grid cells (B). Firing rate is plotted in terms of “fraction of run” to allow ensemble analysis across both time-fixed and distance-fixed sessions. (C) Distribution of the number of firing fields observed for each type of cell (CA1 data from Kraus et al. (2013)). Legend in panel C applies to panels C–F. (D) Distribution (top) and cumulative distribution (bottom) of the width of the first firing field for each neuron. (E) Distribution (top) and cumulative distribution (bottom) of the peak rate of each neuron divided by the average rate of each neuron. A smaller value indicates broader firing fields. Vertical black line indicates the maximum difference between cumulative distributions. (F) Distribution of field widths as a function of the time of peak firing. Open-circles are fields cut off by the end of the treadmill run. See also Figures S2 and S5 and Table S1.