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A massively asynchronous, parallel brain.

Semir Zeki1

  • 1Laboratory of Neurobiology, University College London, London WC1E 6BT, UK s.zeki@ucl.ac.uk.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|April 1, 2015
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Summary
This summary is machine-generated.

The visual brain processes information asynchronously, with different attributes like color and motion perceived at different times. This review proposes that binding these asynchronous perceptions occurs post-perceptually, outside the visual brain.

Keywords:
Riddoch Syndromeasynchronous brain operationshierarchical processingparallel processingperceptual asynchrony

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Area of Science:

  • Neuroscience
  • Visual Perception
  • Cognitive Science

Background:

  • Visual processing involves parallel or serial strategies.
  • Different visual attributes (color, form, motion) are perceived asynchronously.
  • This asynchrony poses a challenge for unified visual experience.

Purpose of the Study:

  • To review the problem of binding asynchronously perceived visual attributes.
  • To propose a model for how visual information is integrated.
  • To challenge the notion of a central neural clock for visual synchronization.

Main Methods:

  • Literature review of visual processing and perception.
  • Theoretical discussion on neural synchronization and binding.
  • Hypothesizing mechanisms for post-perceptual integration.

Main Results:

  • Visual attributes are processed and perceived asynchronously (e.g., color leads form by 40ms, motion by 80ms).
  • No evidence for a central neural clock synchronizing visual processing.
  • The brain operates as a massively asynchronous system.

Conclusions:

  • Visual attribute binding likely occurs post-perceptually, outside specialized visual areas.
  • Independent resetting of parallel processing systems contributes to brain asynchrony.
  • This asynchronous model aligns with efficient computational principles.