Modeling Boundary Vector Cell Firing Given Optic Flow as a Cue
Figure 6
Boundary vector cell (BVC) responses (rate maps) for a square (top) and circular (bottom) box for the model and from data.
a) Shows the square box and the occupancy that is high at edges for the simulated rat trajectory. b) Rate maps for the BVC model using ground-truth distance and direction of walls. For the model we used eight allocentric directions ranging from east, east-north, north, … to south-east combined with the three distance tunings 2 cm, 10 cm, and 25 cm. High firing is encoded as red color and low as blue color. This color encoding is the same for all plots showing firing rate maps. White numbers are the individual scaling parameters for each plot similar to the firing rate scaling used for plotting the experimental data. c) Example of recorded BVCs. These firing maps have been redrawn from Lever et al, J. of Neurosci. 29, 2009 from their Figure 3 on page 9774 [3]. The numbers in black denote the firing rate of the cells. d) The BVC model receives estimates about allocentric direction and distance from our template model. e) Shows the circular box and occupancy of the simulated trajectory. f) Shows the rate maps of the BVC model that uses distance and direction estimates of our template model. g) Data from recorded BVCs [3].