Longitudinal white matter changes associated with cognitive training.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Neuroimaging

Background:

• Behavioral improvements correlate with brain structural and functional changes.
• The extent to which these brain changes generalize to untrained tasks (near or far transfer) is debated.

Purpose of the Study:

• To investigate if training on cognitive tasks induces near or far transfer.
• To identify the neural mechanisms underlying any observed transfer effects.

Main Methods:

• Healthy adults trained on verbal inhibitory control or visuospatial working memory tasks for 4 weeks.
• Diffusion tensor imaging (DTI) was used to track white matter microstructure changes.
• Near and far transfer were assessed using distinct cognitive tasks.

Main Results:

• Participants improved on trained tasks but showed no significant near or far transfer.
• Verbal inhibitory control training altered left-lateralized frontotemporal and occipitofrontal white matter tracts.
• Visuospatial working memory training altered right-lateralized frontoparietal white matter tracts.

Conclusions:

• Specific white matter changes from training did not overlap, preventing generalizable cognitive benefits.
• Task-specific neural adaptations limit near and far transfer, despite observed behavioral improvements.