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Differential aging effects in motion perception tasks for central and peripheral vision.

Juan A Sepulveda1, Andrew J Anderson1, Joanne M Wood1

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Summary

Aging affects motion perception differently across tasks and visual fields. While some motion processing declines similarly in central and peripheral vision, surround suppression shows distinct age-related changes in these areas.

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Area of Science:

  • Neuroscience
  • Vision Science
  • Gerontology

Background:

  • Motion perception is vital for daily activities like driving and locomotion.
  • Aging's impact on visual processing, particularly motion perception across different spatial locations, remains incompletely understood.

Purpose of the Study:

  • To investigate how healthy aging affects various hierarchical levels of motion processing.
  • To compare age-related differences in motion perception between central and peripheral vision.

Main Methods:

  • Assessed motion perception tasks including minimum displacement (Dmin), contrast, speed, surround suppression, global motion coherence, and biological motion.
  • Compared performance in 20 older adults (60-79 years) and 20 younger adults (19-34 years) in both central vision and at 15° eccentricity.

Main Results:

  • Older adults showed significantly higher thresholds for motion contrast, speed, Dmin, and biological motion compared to younger adults.
  • Age-related differences were similar in central and peripheral vision for most tasks.
  • Surround suppression of motion exhibited different age effects: weaker in central vision and stronger in the periphery for older adults.

Conclusions:

  • Aging does not uniformly impact all aspects of motion processing.
  • While some peripheral motion processing can be predicted from central vision, age effects on surround suppression differ markedly between central and peripheral visual fields.