Reservoir computing model of prefrontal cortex creates novel combinations of previous navigation sequences from hippocampal place-cell replay with spatial reward propagation
Fig 9
Reverse replay allows novel shortcut path generation.
Panels A and B illustrate the trajectories for left and right trajectories, based on Gupta et al. After training on these two trajectories, we test the ability to generate a shortcut that makes the complete outer loop in one direction. Panel C–without reverse replay, significant spatial errors are revealed when the system attempts to complete the counter-clockwise loop on the right side of the maze. Panel D illustrates the beneficial effects of reverse replay during trajectory learning. Panel E illustrates the effect of a model training with 100% reverse replay. It is similar to using 0% reverse replay but the effect is observed on the left lap trajectory part. Panel F–when reverse replay is introduced, this error is attenuated.