Fig. 6.

Results from electrophysiology compared with model behavior. A: in Mello et al. (2015), electrophysiological recordings in rat striatum during a timekeeping task identified medium spiny neurons that fired sequentially during the delay period and whose response profiles rescaled to reflect the timed duration [fixed interval (FI); note scaling of x-axis] but maintained their relative ordering. In addition, by visual inspection, the gradual increase in response profile widths across cells within each trial seems similar across different task durations, as would be suggested by the scalar property. Reprinted from Mello et al. (2015) with permission from Elsevier. B: our model recapitulates both phenomena. See methods for simulation details.