White Matter Neuroplasticity: Motor Learning Activates the Internal Capsule and Reduces Hemodynamic Response Variability
Numerous studies have noted the importance of white matter changes in motor learning, but existing literature only focuses on structural and microstructural MRI changes, as there are limited tools available for in vivo investigations of white matter function. One method that has gained recent promin...
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Frontiers Media S.A.
2020-10-01
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Series: | Frontiers in Human Neuroscience |
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Online Access: | https://www.frontiersin.org/articles/10.3389/fnhum.2020.509258/full |
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Article |
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DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tory O. Frizzell Tory O. Frizzell Lukas A. Grajauskas Lukas A. Grajauskas Lukas A. Grajauskas Careesa C. Liu Careesa C. Liu Careesa C. Liu Sujoy Ghosh Hajra Sujoy Ghosh Hajra Sujoy Ghosh Hajra Xiaowei Song Xiaowei Song Ryan C. N. D’Arcy Ryan C. N. D’Arcy Ryan C. N. D’Arcy Ryan C. N. D’Arcy |
spellingShingle |
Tory O. Frizzell Tory O. Frizzell Lukas A. Grajauskas Lukas A. Grajauskas Lukas A. Grajauskas Careesa C. Liu Careesa C. Liu Careesa C. Liu Sujoy Ghosh Hajra Sujoy Ghosh Hajra Sujoy Ghosh Hajra Xiaowei Song Xiaowei Song Ryan C. N. D’Arcy Ryan C. N. D’Arcy Ryan C. N. D’Arcy Ryan C. N. D’Arcy White Matter Neuroplasticity: Motor Learning Activates the Internal Capsule and Reduces Hemodynamic Response Variability Frontiers in Human Neuroscience functional magnetic resonance imaging white matter activation neuroplasticity motor learning functional connectivity internal capsule |
author_facet |
Tory O. Frizzell Tory O. Frizzell Lukas A. Grajauskas Lukas A. Grajauskas Lukas A. Grajauskas Careesa C. Liu Careesa C. Liu Careesa C. Liu Sujoy Ghosh Hajra Sujoy Ghosh Hajra Sujoy Ghosh Hajra Xiaowei Song Xiaowei Song Ryan C. N. D’Arcy Ryan C. N. D’Arcy Ryan C. N. D’Arcy Ryan C. N. D’Arcy |
author_sort |
Tory O. Frizzell |
title |
White Matter Neuroplasticity: Motor Learning Activates the Internal Capsule and Reduces Hemodynamic Response Variability |
title_short |
White Matter Neuroplasticity: Motor Learning Activates the Internal Capsule and Reduces Hemodynamic Response Variability |
title_full |
White Matter Neuroplasticity: Motor Learning Activates the Internal Capsule and Reduces Hemodynamic Response Variability |
title_fullStr |
White Matter Neuroplasticity: Motor Learning Activates the Internal Capsule and Reduces Hemodynamic Response Variability |
title_full_unstemmed |
White Matter Neuroplasticity: Motor Learning Activates the Internal Capsule and Reduces Hemodynamic Response Variability |
title_sort |
white matter neuroplasticity: motor learning activates the internal capsule and reduces hemodynamic response variability |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Human Neuroscience |
issn |
1662-5161 |
publishDate |
2020-10-01 |
description |
Numerous studies have noted the importance of white matter changes in motor learning, but existing literature only focuses on structural and microstructural MRI changes, as there are limited tools available for in vivo investigations of white matter function. One method that has gained recent prominence is the application of blood oxygen level dependent (BOLD) fMRI to white matter, with high-field scanners now being able to better detect the smaller hemodynamic changes present in this tissue type compared to those in the gray matter. However, fMRI techniques have yet to be applied to investigations of neuroplastic change with motor learning in white matter. White matter function represents an unexplored component of neuroplasticity and is essential for gaining a complete understanding of learning-based changes occurring throughout the whole brain. Twelve healthy, right-handed participants completed fine motor and gross motor tasks with both hands, using an MRI compatible computer mouse. Using a crossover design along with a prior analysis approach to establish WM activation, participants received a baseline scan followed by 2 weeks of training, returning for a midpoint and endpoint scan. The motor tasks were designed to be selectively difficult for the left hand, leading to a training effect only in that condition. Analysis targeted the comparison and detection of training-associated right vs left hand changes. A statistically significant improvement in motor task score was only noted for the left-hand motor condition. A corresponding change in the temporal characteristics of the white matter hemodynamic response was shown within only the right corticospinal tract. The hemodynamic response exhibited a reduction in the dispersion characteristics after the training period. To our knowledge, this is the first report of MRI detectable functional neuroplasticity in white matter, suggesting that modifications in temporal characteristics of white matter hemodynamics may underlie functional neuroplasticity in this tissue. |
topic |
functional magnetic resonance imaging white matter activation neuroplasticity motor learning functional connectivity internal capsule |
url |
https://www.frontiersin.org/articles/10.3389/fnhum.2020.509258/full |
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doaj-1b2f811c1bec4dcb88145d5cc529999c2020-11-25T03:40:44ZengFrontiers Media S.A.Frontiers in Human Neuroscience1662-51612020-10-011410.3389/fnhum.2020.509258509258White Matter Neuroplasticity: Motor Learning Activates the Internal Capsule and Reduces Hemodynamic Response VariabilityTory O. Frizzell0Tory O. Frizzell1Lukas A. Grajauskas2Lukas A. Grajauskas3Lukas A. Grajauskas4Careesa C. Liu5Careesa C. Liu6Careesa C. Liu7Sujoy Ghosh Hajra8Sujoy Ghosh Hajra9Sujoy Ghosh Hajra10Xiaowei Song11Xiaowei Song12Ryan C. N. D’Arcy13Ryan C. N. D’Arcy14Ryan C. N. D’Arcy15Ryan C. N. D’Arcy16Simon Fraser University ImageTech Lab, Health Science and Innovation, Surrey Memorial Hospital, Fraser Health, Surrey, BC, CanadaFaculty of Applied Sciences, Simon Fraser University, Burnaby, BC, CanadaSimon Fraser University ImageTech Lab, Health Science and Innovation, Surrey Memorial Hospital, Fraser Health, Surrey, BC, CanadaCumming School of Medicine, University of Calgary, Calgary, AB, CanadaDepartment of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, CanadaSimon Fraser University ImageTech Lab, Health Science and Innovation, Surrey Memorial Hospital, Fraser Health, Surrey, BC, CanadaFaculty of Applied Sciences, Simon Fraser University, Burnaby, BC, CanadaRotman Research Institute, Baycrest Health Sciences, Toronto, ON, CanadaSimon Fraser University ImageTech Lab, Health Science and Innovation, Surrey Memorial Hospital, Fraser Health, Surrey, BC, CanadaFaculty of Applied Sciences, Simon Fraser University, Burnaby, BC, CanadaFlight Research Laboratory, National Research Council Canada, Ottawa, ON, CanadaSimon Fraser University ImageTech Lab, Health Science and Innovation, Surrey Memorial Hospital, Fraser Health, Surrey, BC, CanadaDepartment of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, CanadaSimon Fraser University ImageTech Lab, Health Science and Innovation, Surrey Memorial Hospital, Fraser Health, Surrey, BC, CanadaFaculty of Applied Sciences, Simon Fraser University, Burnaby, BC, CanadaDepartment of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, CanadaDjavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, BC, CanadaNumerous studies have noted the importance of white matter changes in motor learning, but existing literature only focuses on structural and microstructural MRI changes, as there are limited tools available for in vivo investigations of white matter function. One method that has gained recent prominence is the application of blood oxygen level dependent (BOLD) fMRI to white matter, with high-field scanners now being able to better detect the smaller hemodynamic changes present in this tissue type compared to those in the gray matter. However, fMRI techniques have yet to be applied to investigations of neuroplastic change with motor learning in white matter. White matter function represents an unexplored component of neuroplasticity and is essential for gaining a complete understanding of learning-based changes occurring throughout the whole brain. Twelve healthy, right-handed participants completed fine motor and gross motor tasks with both hands, using an MRI compatible computer mouse. Using a crossover design along with a prior analysis approach to establish WM activation, participants received a baseline scan followed by 2 weeks of training, returning for a midpoint and endpoint scan. The motor tasks were designed to be selectively difficult for the left hand, leading to a training effect only in that condition. Analysis targeted the comparison and detection of training-associated right vs left hand changes. A statistically significant improvement in motor task score was only noted for the left-hand motor condition. A corresponding change in the temporal characteristics of the white matter hemodynamic response was shown within only the right corticospinal tract. The hemodynamic response exhibited a reduction in the dispersion characteristics after the training period. To our knowledge, this is the first report of MRI detectable functional neuroplasticity in white matter, suggesting that modifications in temporal characteristics of white matter hemodynamics may underlie functional neuroplasticity in this tissue.https://www.frontiersin.org/articles/10.3389/fnhum.2020.509258/fullfunctional magnetic resonance imagingwhite matter activationneuroplasticitymotor learningfunctional connectivityinternal capsule |