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A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance
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Exploring interhemispheric collaboration in older compared to younger adults.

Barbara J Cherry1, Mariana Yamashiro, Erin Anderson

  • 1California State University, Fullerton, CA 92831, USA. bcherry@fullerton.edu

Brain and Cognition
|October 16, 2009
PubMed
Summary

Older adults show altered brain hemisphere collaboration during cognitive tasks, with efficiency and task complexity influencing processing distribution. This suggests age-related brain changes impact how information is processed across hemispheres.

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Area of Science:

  • Cognitive Neuroscience
  • Neuropsychology
  • Human Aging Research

Background:

  • Interhemispheric collaboration is crucial for cognitive functions.
  • Aging can affect brain structure and function, potentially altering hemispheric communication.

Purpose of the Study:

  • To investigate age-related differences in interhemispheric collaboration.
  • To explore the influence of task demands and individual cognitive efficiency on hemispheric processing.

Main Methods:

  • Utilized physical and name identity letter-matching tasks.
  • Administered neuropsychological tests for frontal/executive functioning.
  • Compared performance between younger and older adults, and low/high efficiency groups.

Main Results:

  • Found a significant Task by Across/Within interaction for both age groups.
  • Older adults showed a stronger within-hemisphere advantage for physical tasks and weaker across-hemisphere advantage for name tasks.
  • Higher cognitive efficiency and better executive function correlated with reduced across-hemisphere advantage for name identity tasks.

Conclusions:

  • Task complexity and specific demands modulate hemispheric processing distribution in aging.
  • Age-related changes in gray and white matter may influence processing load distribution across hemispheres.