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Visual bandwidths for face orientation increase during healthy aging.

Hugh R Wilson1, Ming Mei, Claudine Habak

  • 1Centre for Vision Research, York University, Toronto, Canada. hrwilson@yorku.ca

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Summary
This summary is machine-generated.

Aging impairs face perception due to broader visual processing bandwidths and increased neural noise, similar to declines in motion perception. This suggests shared causes in aging visual system changes.

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Area of Science:

  • Neuroscience
  • Vision Science
  • Gerontology

Background:

  • Visual motion perception declines with age, linked to reduced cortical GABA inhibition, increased neural noise, and broader motion bandwidths.
  • Higher-level form vision, like face perception, is less understood in aging, though frontal face recognition remains stable until later in life.

Purpose of the Study:

  • To investigate age-related deficits in face matching, specifically when viewing transformations between frontal and profile views.
  • To determine if age-related face perception deficits stem from broadened cortical bandwidths for face orientation and increased neural noise.

Main Methods:

  • Utilized face view adaptation paradigm to assess face matching abilities in elderly individuals.
  • Developed a neural model to quantify changes in face orientation bandwidths and internal noise with age.
  • Compared age-related changes in face processing bandwidths with previously reported motion perception data.

Main Results:

  • Elderly individuals exhibit a specific deficit in matching faces across different views (frontal vs. profile).
  • Face view adaptation revealed significantly broadened cortical bandwidths for face orientation and increased internal noise in older adults.
  • A neural model indicated a 1.74-fold increase in head orientation bandwidths between ages 26 and 67, mirroring age-related increases in motion bandwidths.

Conclusions:

  • Age-related declines in higher-level form vision, such as face perception, occur in parallel with declines in motion perception.
  • Broadened cortical bandwidths and increased neural noise, potentially due to decreased cortical inhibition, underlie these age-related visual processing deficits.
  • These findings suggest common underlying neural mechanisms contribute to the degradation of both motion and form vision during aging.