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Altered prefrontal function with aging: insights into age-associated performance decline.

Anne-Kristin Solbakk1, Galit Fuhrmann Alpert, Ansgar J Furst

  • 1Department of Psychology and the Helen Wills Neuroscience Institute, University of California, Berkeley, CA, USA. anne-kristin.solbakk@rikshospitalet.no

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Summary
This summary is machine-generated.

Aging impacts visuo-spatial attention networks, showing reduced brain activation extent in older adults. These neural changes correlate with altered cognitive performance, highlighting age-related shifts in attention.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Aging Research

Background:

  • Visuo-spatial attention is crucial for navigating and interacting with the environment.
  • Aging is associated with changes in cognitive functions, including attention.
  • Understanding age-related alterations in neural networks underlying attention is vital.

Purpose of the Study:

  • To investigate the effects of aging on the neural mechanisms of visuo-spatial attention.
  • To compare brain activation patterns during a selective visual attention task between young and older adults.
  • To explore the relationship between neural activity, brain activation extent, and task performance in different age groups.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure blood oxygenation level dependent (BOLD) responses.
  • Participants performed a bi-field visual selective attention task with targets and novel stimuli.
  • Older and young adult groups were compared on behavioral performance and brain activation patterns.

Main Results:

  • Older adults exhibited slower reaction times and more false alarms but comparable detection accuracy.
  • Both age groups activated similar attention networks, including anterior and posterior association cortex.
  • Older adults showed reduced spatial extent of activation in prefrontal, basal ganglia, and visual processing areas, particularly the anterior cingulate and superior frontal gyrus.
  • The spatial extent of activation correlated with performance, with young adults relying on posterior regions and older adults on frontal areas.

Conclusions:

  • Aging significantly alters the functioning of neural networks supporting visuo-spatial attention.
  • Age-related differences in brain activation extent and regional engagement are linked to cognitive performance.
  • These findings provide insights into the neural basis of age-related cognitive changes in attention.