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Neural changes related to motion processing in healthy aging.

Stefanie C Biehl1, Melanie Andersen1, Gordon D Waiter2

  • 1School of Psychology, University of Aberdeen, Aberdeen, UK.

Neurobiology of Aging
|June 27, 2017
PubMed
Summary
This summary is machine-generated.

Healthy aging shows reduced low-level motion processing but preserved biological motion perception. Older adults use more brain resources for basic motion, unlike familiar biological motion processing.

Keywords:
Biological motionHealthy agingMotion processingRadial motionfMRI

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Area of Science:

  • Neuroscience
  • Cognitive Aging
  • Perception

Background:

  • Behavioral studies indicate a decline in low-level motion processing with healthy aging.
  • Processing of familiar biological motion remains relatively preserved in older adults.

Purpose of the Study:

  • To investigate the neural mechanisms underlying age-related differences in motion processing.
  • To compare brain activation patterns for low-level radial motion versus biological motion in younger and older adults.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to study 19 healthy older adults and 19 younger adults.
  • Brain activation was analyzed for responses to low-level radial and biological motion stimuli.
  • Regions of interest (ROIs) were evaluated for activation magnitude and time courses.

Main Results:

  • Older adults exhibited increased temporal and frontal activation for low-level motion compared to younger adults.
  • No significant age-related differences in brain activation were found for biological motion processing.
  • Time-course analyses in ROIs confirmed preserved biological motion processing in older adults.

Conclusions:

  • Healthy aging may necessitate additional neural resources for processing basic, low-level motion.
  • Neural substrates for processing complex, familiar biological motion appear to be maintained in older age.
  • This suggests a selective impact of aging on different visual motion processing pathways.