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Neural Sensitivity to Radial Frequency Patterns in the Visual Cortex of Developing Macaques.

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  • 1Center for Neural Science, New York University, New York, New York 10003.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|July 3, 2025
PubMed
Summary
This summary is machine-generated.

Visual processing in infant monkeys shows that area V4 reliably encodes global form early in development. This suggests higher visual areas, not just early ones, are key to improving perception as infants mature.

Keywords:
extrastriate visual cortexform visionhyperacuitymacaque monkeyvisual development

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Visual Perception

Background:

  • Infant visual perception improves with age, but early visual areas like V1 do not fully explain these gains.
  • Maturation of downstream visual areas (V2, V4, IT) may support complex perceptual abilities in developing infants.

Purpose of the Study:

  • To investigate the neural basis of developing visual form perception in infant nonhuman primates.
  • To identify which visual areas are responsible for encoding global form stimuli at different developmental stages.

Main Methods:

  • Recorded neural population activity in visual areas V1, V2, V4, and PIT in infant and adult monkeys.
  • Presented radial frequency patterns, a type of global form stimulus, to assess neural responses.
  • Analyzed neural decoding performance across development to correlate with behavioral improvements.

Main Results:

  • Neurons and neural populations in V4 reliably encoded global form stimuli even at the earliest ages studied.
  • V1 neurons did not show reliable global form encoding in infants.
  • V2 and PIT populations exhibited some early selectivity for global form, particularly at higher radial frequencies.

Conclusions:

  • Area V4 plays a crucial role in encoding global form perception early in visual development.
  • Improvements in behavioral visual sensitivity may stem from the maturation of areas like V4, rather than solely from early visual cortex (V1).
  • Neural decoding performance did not systematically change with age in a way that fully explains behavioral improvements.