A model of head direction and landmark coding in complex environments
Fig 5
Mirrored environments with the simulation result in dRSC signals.
(A) Illustration of the connected environments with mirrored and rotated complex sceneries. The agent repeatedly crosses from one environment to the other, spending 60 seconds in each environment at a time, for the duration of the whole 20-minute learning phase. (B) The learnt connection weights form the bimodality of dRSC responses after the whole learning phase. (C) Global representations of aLB cells (left, with a single cell example) and dRSC cells (right, with a single cell example) after learning, tested in alternating environments (top, row; 10 seconds in each environment) or in a single environment (Env. I, bottom row). Note that aLB cells are unimodal within a given environment (bottom left), contrary to WC-BD cells. aLB cells are labelled as positive numbers, whilst other cells are labelled from -180 to 179 according to their own initial preferred directions (y-axis). The x-axis stands for HD. Abbreviations: aLB: abstract landmark bearing; gRSC/dRSC: granular/dysgranular retrosplenial cortex; HD: head direction; f: firing rate.