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Related Experiment Video

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Tracking microstructural adaptations in primary visual areas: A diffusion kurtosis imaging study on visuomotor

Fahad Alharshan1, Abdulrahman Aloufi2, Fiona Rowe3

  • 1Department of Radiological Sciences, College of Applied Medical Scieneces, King Saud bin Abdulaziz University for Health Sciences, Alahsa, Saudi Arabia; Faculty of Health and Life Sciences, University of Liverpool, Liverpool, United Kingdom.

Neuroimage
|March 13, 2025
PubMed
Summary

Diffusion Kurtosis Imaging (DKI) detects microstructural brain changes after visuomotor training, offering more detail than Diffusion Tensor Imaging (DTI). Key changes were observed in the cuneus, highlighting DKI

Keywords:
DKIDTIMicrostructural changeNeuroplasticityPrimary visual areasVisuomotor training

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Area of Science:

  • Neuroimaging
  • Neuroplasticity
  • Cognitive Neuroscience

Background:

  • Visuomotor training induces brain plasticity.
  • Diffusion Tensor Imaging (DTI) measures water diffusion in brain tissue.
  • Diffusion Kurtosis Imaging (DKI) offers more detailed microstructural information than DTI.

Purpose of the Study:

  • To evaluate DKI's ability to detect microstructural changes from visuomotor training.
  • To compare DKI's sensitivity with DTI.
  • To identify brain regions and specific DKI metrics sensitive to training-induced changes.

Main Methods:

  • Fourteen healthy participants underwent a six-week home-based eye movement training intervention.
  • Pre- and post-training DKI and DTI brain scans were acquired.
  • Descriptive analysis, including Coefficient of Variation (CV) and Bland-Altman (BA) metrics, assessed training effects.

Main Results:

  • Significant reductions in kurtosis (MK, RK, AK) and mean diffusivity (MD) were found in task-relevant areas like the cuneus.
  • Kurtosis metrics (MK, AK) were more sensitive than DTI in the pericalcarine area.
  • Bland-Altman analysis confirmed specific training-related changes in the visual target area, with stable control regions.

Conclusions:

  • DKI effectively captures training-induced microstructural changes, complementing DTI.
  • Axial Kurtosis (AK) is a stable and sensitive marker for visuomotor training.
  • The study highlights the cuneus's role in visuomotor adaptation and DKI's potential in cognitive training and neurorehabilitation.