A Multi-Area Stochastic Model for a Covert Visual Search Task.

ABSTRACT: Decisions typically comprise several elements. For example, attention must be directed towards specific objects, their identities recognized, and a choice made among alternatives. Pairs of competing accumulators and drift-diffusion processes provide good models of evidence integration in two-alternative perceptual choices, but more complex tasks requiring the coordination of attention and decision making involve multistage processing and multiple brain areas. Here we consider a task in which a target is located among distractors and its identity reported by lever release. The data comprise reaction times, accuracies, and single unit recordings from two monkeys' lateral interparietal area (LIP) neurons. LIP firing rates distinguish between targets and distractors, exhibit stimulus set size

SUBMITTER: Schwemmer MA 

PROVIDER: S-EPMC4545888 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature