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Tidying up white matter: Neuroplastic transformations in sensorimotor tracts following slackline skill acquisition
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Journal Article
Tidying up white matter: Neuroplastic transformations in sensorimotor tracts following slackline skill acquisition
2024
Overview
This study investigated changes in white matter (WM) morphology following complex motor learning, that is, the learning to walk a slackline. A sample of young adults from the general population underwent brain imaging before the slackline intervention, after successful learning, and after a subsequent follow‐up period by applying state‐of‐the‐art measures for the assessment of micro‐ and macrostructural characteristics of WM fiber tracts (voxel‐based and fixel‐based). A randomly assigned control group (CG) was scanned at the same time points of assessment but received no intervention over the study period. Learning to walk a slackline resulted in manifold changes in WM morphology: (1) Whole brain fixel‐based analyses revealed robust increases in the fiber cross‐section in bundles closely associated with sensorimotor functions (e.g., superior longitudinal fasciculi, corticospinal tract); (2) The neurite orientation dispersion and density imaging (NODDI) parameters showed widespread decreases in overlapping fiber bundles. In the CG, no time‐related WM changes were apparent at all. This well‐controlled longitudinal intervention study provides substantial new evidence that learning a complex motor skill modulates fiber organization and fiber density in sensorimotor tracts.
This randomized longitudinal study investigates training‐induced changes in white matter morphology after a highly challenging motor learning task (slackline). Changes were found solely in the intervention group, demonstrated in NODDI (green box) and Fixel‐related metrics (yellow box).
Publisher
John Wiley & Sons, Inc
Subject
