An implicit memory of errors limits human sensorimotor adaptation.

ABSTRACT: During extended motor adaptation, learning appears to saturate despite persistence of residual errors. This adaptation limit is not fixed but varies with perturbation variance; when variance is high, residual errors become larger. These changes in total adaptation could relate to either implicit or explicit learning systems. Here, we found that when adaptation relied solely on the explicit system, residual errors disappeared and learning was unaltered by perturbation variability. In contrast, when learning depended entirely, or in part, on implicit learning, residual errors reappeared. Total implicit adaptation decreased in the high-variance environment due to changes in error sensitivity, not in forgetting. These observations suggest a model in which the implicit system becomes more sensi

SUBMITTER: Albert ST 

PROVIDER: S-EPMC11910176 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature