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Practice-related functional activation changes in a working memory task.

H Garavan1, D Kelley, A Rosen

  • 1Department of Psychiatry, Medical College of Wisconsin, Milwaukee, WI 53202, USA. Hugh.Garavan@tcd.ie

Microscopy Research and Technique
|September 26, 2000
PubMed
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Practice improves performance on visuospatial working memory (VSWM) tasks without altering its neural dependence. Functional neuroanatomy shows decreased activation with practice, suggesting a more precise map emerges as task novelty diminishes.

Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Understanding how the brain adapts to learning is crucial for cognitive science.
  • Visuospatial working memory (VSWM) is a key cognitive function.
  • Practice-related changes in brain activation patterns are not fully understood.

Purpose of the Study:

  • To investigate the effects of practice on the functional neuroanatomy of a VSWM task.
  • To determine if practice leads to a re-organization of brain regions involved in VSWM.
  • To examine how practice influences brain activation patterns during a VSWM task.

Main Methods:

  • Functional Magnetic Resonance Imaging (fMRI) was used to monitor brain activity.
  • Participants performed a delayed-match-to-sample task with varying amounts of practice.

Related Experiment Videos

  • Analysis focused on changes in activation in frontal, parietal, cingulate, insular, and occipital regions.

    • Main Results:

    • Task performance improved with practice, but VSWM dependence remained constant.
    • Practice led to decreased activation in most studied brain regions, except the posterior cingulate.
    • Fewer brain regions met statistical criteria after practice, indicating a refinement of the functional map.

    Conclusions:

    • Practice refines the functional neuroanatomy of VSWM tasks, reducing activation in some areas.
    • Practice effects must be considered to avoid misinterpreting functional activation.
    • Tracking functional changes during learning provides insights into skill acquisition and cognitive process refinement.