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Cortical differentiation and neurocognitive development: The parcellation conjecture.

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The Parcellation Conjecture suggests that during development, brain pathways segregate into distinct modules. This review examines evidence supporting this theory in areas like vision and cognitive functions.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Cognitive Science

Background:

  • Cortical development involves the segregation of information processing.
  • The Parcellation Conjecture posits that initially integrated pathways become modularized postnatally.

Purpose of the Study:

  • To review evidence supporting the Parcellation Conjecture.
  • To extend the conjecture to new developmental domains and cognitive functions.

Main Methods:

  • Review of existing literature on behavioral development.
  • Analysis of evidence from visual, cross-modal, and interhemispheric transfer studies.
  • Speculative extension to cognitive domains like priming and interference.

Main Results:

  • Evidence from binocular vision, cross-modal integration, and interhemispheric transfer supports the conjecture.
  • Predictions are made for motion/color sensitivity and somatosensory perception.

Conclusions:

  • The Parcellation Conjecture provides a framework for understanding cortical development.
  • Further research is needed to validate predictions in sensory and cognitive domains.