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Related Experiment Video

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Development of an Uncomplicated Mild Traumatic Brain Injury Model Modified by Weight-Drop Method and Evidenced by Magnetic Resonance Imaging
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Microstructural Organization of Distributed White Matter Associated With Fine Motor Control in US Service Members

Benjamin S C Wade1,2, David F Tate1,3, Eamonn Kennedy1,4

  • 1TBI and Concussion Center, Department of Neurology, University of Utah, Salt Lake City, Utah, USA.

Journal of Neurotrauma
|September 11, 2023
PubMed
Summary

Mild traumatic brain injury (mTBI) can affect fine motor skills. White matter organization in specific brain tracts is linked to better performance on fine motor tasks in military personnel with mTBI history.

Keywords:
MRIfine motor controlgrooved pegboardmild traumatic brain injuryservice memberswhite matter organization

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Area of Science:

  • Neuroscience
  • Traumatic Brain Injury Research
  • Military Health

Background:

  • Mild traumatic brain injury (mTBI) is common, with ~20% experiencing persistent symptoms like reduced fine motor control.
  • Understanding the neural underpinnings of persistent deficits is crucial for military Service Members and Veterans (SM&Vs).

Purpose of the Study:

  • To investigate the relationship between white matter integrity, subcortical volumes, and fine motor control (Grooved Pegboard test performance) in SM&Vs.
  • To determine if mTBI history influences these relationships.

Main Methods:

  • Magnetic resonance imaging (MRI) and the Grooved Pegboard (GPB) test were administered to 847 SM&Vs with mTBI history and 190 without.
  • Tractwise diffusivity, subcortical volumes, and cortical thickness were analyzed in relation to GPB performance.
  • Group differences in GPB completion time were assessed.

Main Results:

  • SM&Vs with mTBI history showed a trend towards worse performance on the non-dominant hand GPB test.
  • Higher fractional anisotropy (FA) in the posterior corona radiata, superior longitudinal fasciculus, and uncinate fasciculus correlated with better dominant-hand GPB performance in the mTBI group.
  • mTBI history did not moderate the association between regional FA and GPB performance.

Conclusions:

  • White matter organization in specific tracts is associated with fine motor performance in SM&Vs.
  • Chronic mTBI may not significantly alter the relationship between white matter integrity and fine motor control.