Abstract
The purpose of this study is to identify white matter microstructure changes following bilateral upper extremity motor skill training to increase our understanding of learning-induced structural plasticity and enhance clinical strategies in physical rehabilitation. Eleven healthy subjects performed two visuo-spatial motor training tasks over 9 sessions (2-3 sessions per week). Subjects controlled a cursor with bilateral simultaneous movements of the shoulders and upper arms using a body machine interface. Before the start and within 2. days of the completion of training, whole brain diffusion tensor MR imaging data were acquired. Motor training increased fractional anisotropy (FA) values in the posterior and anterior limbs of the internal capsule, the corona radiata, and the body of the corpus callosum by 4.19% on average indicating white matter microstructure changes induced by activity-dependent modulation of axon number, axon diameter, or myelin thickness. These changes may underlie the functional reorganization associated with motor skill learning.
Original language | English (US) |
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Pages (from-to) | 32-40 |
Number of pages | 9 |
Journal | Neuroimage |
Volume | 88 |
DOIs | |
State | Published - Mar 2014 |
Funding
This study was supported by NICHHD grants 1R21HD053608-01A1 , 1T32HD057845-01A2 , and 1R01HD072080-01 , NIDRR grant H133E120010 , NCCAM grant 1F32AT007800-01 , Neilsen Foundation, Brinson Foundation , FP7-PEOPLE-2012-CIG-334201 (REMAKE) and the Center for Translational Imaging, Department of Radiology, Northwestern University.
Keywords
- Diffusion tensor imaging
- Fractional anisotropy
- Motor skill learning
- White matter plasticity
ASJC Scopus subject areas
- Neurology
- Cognitive Neuroscience