Journal
HUMAN BRAIN MAPPING
Volume 39, Issue 4, Pages 1516-1531Publisher
WILEY
DOI: 10.1002/hbm.23924
Keywords
functional connectivity; gray matter volume; neural predictors; savings; sensorimotor adaptation
Funding
- National Space Biomedical Research Institute (NASA) [NCC 9-58, MA02701, PF04101]
- National Aeronautics and Space Administration (NASA) [NNX11AR02G]
- NASA Flight Analogs Project
- National Institutes of Health
- National Center for Advancing Translational Sciences [1UL1RR029876-01]
- NATIONAL CENTER FOR RESEARCH RESOURCES [UL1RR029876] Funding Source: NIH RePORTER
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In this study, we investigate whether individual variability in the rate of visuomotor adaptation and multiday savings is associated with differences in regional gray matter volume and resting-state functional connectivity. Thirty-four participants performed a manual adaptation task during two separate test sessions, on average 9 days apart. Functional connectivity strength between sensorimotor, dorsal cingulate, and temporoparietal regions of the brain was found to predict the rate of learning during the early phase of the adaptation task. In contrast, default mode network connectivity strength was found to predict both the rate of learning during the late adaptation phase and savings. As for structural predictors, greater gray matter volume in temporoparietal and occipital regions predicted faster early learning, whereas greater gray matter volume in superior posterior regions of the cerebellum predicted faster late learning. These findings suggest that the offline neural predictors of early adaptation may facilitate the cognitive aspects of sensorimotor adaptation, supported by the involvement of temporoparietal and cingulate networks. The offline neural predictors of late adaptation and savings, including the default mode network and the cerebellum, likely support the storage and modification of newly acquired sensorimotor representations.
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