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. Author manuscript; available in PMC: 2010 Oct 6.
Published in final edited form as: Science. 2007 Mar 23;315(5819):1719–1722. doi: 10.1126/science.1139207

Fig. 4.

Fig. 4

Subthreshold oscillations may underlie differences in grid field spacing. A. Reciprocal of oscillation frequency plotted versus anatomical depth for anatomical range matching a previous publication (7) as shown in B. C–D. Simulation of grid cell model (3, 8). Top: Gray indicates trajectory of simulated rat. Red indicates firing locations. Bottom: Firing rate map (red=maximum, blue=no spikes). Grid field spacing is small for mean dorsal oscillation frequency of 6.42 Hz (C) and larger for mean ventral frequency of 4.23 Hz (D).