Representational geometry of perceptual decisions in the monkey parietal cortex.

ABSTRACT: Lateral intraparietal (LIP) neurons represent formation of perceptual decisions involving eye movements. In circuit models for these decisions, neural ensembles that encode actions compete to form decisions. Consequently, representation and readout of the decision variables (DVs) are implemented similarly for decisions with identical competing actions, irrespective of input and task context differences. Further, DVs are encoded as partially potentiated action plans through balance of activity of action-selective ensembles. Here, we test those core principles. We show that in a novel face-discrimination task, LIP firing rates decrease with supporting evidence, contrary to conventional motion-discrimination tasks. These opposite response patterns arise from similar mechanisms in which decisi

SUBMITTER: Okazawa G 

PROVIDER: S-EPMC8273140 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature