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Spatio-Temporal Neural Changes After Task-Switching Training in Old Age.

Sandra Dörrenbächer1, Chiara Schütz1, Marc Woirgardt1

  • 1Department of Psychology, Development of Language, Learning and Action, Saarland University, Saarbrücken, Germany.

Frontiers in Aging Neuroscience
|November 5, 2019
PubMed
Summary
This summary is machine-generated.

Task-switching training in older adults induced selective neural changes. These brain modifications, particularly in the basal ganglia, highlight the critical role of temporal organization in cognitive processing.

Keywords:
agingcognitive control impairmentscontext updatingdelayed recognitionfMRIspatio-temporal overlaptask-switching training

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Aging Research

Background:

  • Cognitive control, including task-switching, declines with age.
  • Neural changes underlying cognitive training in older adults are not fully understood.
  • Distinguishing between sustained and transient neural dynamics is crucial for understanding cognitive control.

Purpose of the Study:

  • To investigate selective neural changes following task-switching training in older adults.
  • To differentiate between changes in sustained/block-related and transient/trial-related neural activation.
  • To examine if neural changes occur in untrained tasks after training.

Main Methods:

  • Fifty older adults were assigned to a task-switching training group or an active control group.
  • Functional magnetic resonance imaging (fMRI) with event-related and block-related designs was used.
  • Two task paradigms assessed transient (context-updating) and sustained (working memory) cognitive control dynamics.

Main Results:

  • Task-switching training led to neural changes not apparent in behavioral data alone.
  • Transient-sensitive task showed temporal overlap in neural changes (left inferior parietal lobule) but not spatial overlap with training regions (ventrolateral PFC, inferior frontal junction, superior parietal lobule).
  • Sustained-sensitive task showed both temporal and spatial overlap in neural changes (basal ganglia) with training regions.

Conclusions:

  • Neural changes after task-switching training in older adults are selective.
  • The temporal organization of neural processing is critical for task-switching training benefits.
  • Task-switching training may enhance cognitive control through overlapping neural mechanisms, particularly in sustained processing.