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Visual perception and phenomenal consciousness

P Stoerig1, A Cowey

  • 1Institute of Medical Psychology, Munich.

Behavioural Brain Research
|November 1, 1995
PubMed
Summary
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Consciousness may be exclusive to self-distinguishing organisms. Investigating visual processing and blindsight in monkeys reveals distinct stages of phenomenal and accessible consciousness, crucial for thought and planning.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Philosophy of Mind

Background:

  • The nature and basis of consciousness remain debated.
  • Distinguishing information processing from conscious representation is key.
  • Understanding consciousness requires addressing who has it, its neural basis, and its function.

Purpose of the Study:

  • To explore the criteria for consciousness in organisms.
  • To identify the neuronal underpinnings of conscious representation.
  • To elucidate the functional role of consciousness.

Main Methods:

  • Analysis of visual processing stages and functional losses after lesions.
  • Utilizing blindsight as a model for studying phenomenal vision.
  • Employing animal models (monkeys) with specific cortical removals.

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Main Results:

  • Proposed consciousness is linked to self-non-self discrimination and modifiable behavior.
  • Differentiated reflexive, phenomenal, and consciously accessible visual processing stages.
  • Demonstrated that striate cortex removal in monkeys mimics blindsight, impacting phenomenal vision.

Conclusions:

  • Phenomenal and consciously accessible vision are distinct aspects of consciousness.
  • Loss of phenomenal vision may lead to loss of conscious accessibility.
  • Consciousness facilitates retrieval and manipulation of information for thinking and planning.