Competing neural representations of choice shape evidence accumulation in humans.

ABSTRACT: Making adaptive choices in dynamic environments requires flexible decision policies. Previously, we showed how shifts in outcome contingency change the evidence accumulation process that determines decision policies. Using in silico experiments to generate predictions, here we show how the cortico-basal ganglia-thalamic (CBGT) circuits can feasibly implement shifts in decision policies. When action contingencies change, dopaminergic plasticity redirects the balance of power, both within and between action representations, to divert the flow of evidence from one option to another. When competition between action representations is highest, the rate of evidence accumulation is the lowest. This prediction was validated in in vivo experiments on human participants, using fMRI, which showed tha

SUBMITTER: Bond K 

PROVIDER: S-EPMC10624421 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature