Secondary motor integration as a final arbiter in sensorimotor decision-making.

ABSTRACT: Sensorimotor decision-making is believed to involve a process of accumulating sensory evidence over time. While current theories posit a single accumulation process prior to planning an overt motor response, here, we propose an active role of motor processes in decision formation via a secondary leaky motor accumulation stage. The motor leak adapts the "memory" with which this secondary accumulator reintegrates the primary accumulated sensory evidence, thus adjusting the temporal smoothing in the motor evidence and, correspondingly, the lag between the primary and motor accumulators. We compare this framework against different single accumulator variants using formal model comparison, fitting choice, and response times in a task where human observers made categorical decisions about a nois

SUBMITTER: Balsdon T 

PROVIDER: S-EPMC10393169 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature