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Perception and awareness after brain damage

M J Farah1

  • 1Department of Psychology, University of Pennsylvania, Philadelphia 19104-6196.

Current Opinion in Neurobiology
|April 1, 1994
PubMed
Summary

Investigating awareness dissociations reveals insights into the brain's awareness mechanisms. Research focuses on blindsight, visual agnosia, and visual neglect to understand perception without conscious awareness.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Philosophy of Mind

Background:

  • Dissociations between perception and awareness offer critical insights into the neural underpinnings of consciousness.
  • Understanding these dissociations aids in elucidating the complex relationship between sensory processing and subjective experience.

Purpose of the Study:

  • To explore the phenomenon of perception-awareness dissociations.
  • To examine the neural correlates of awareness by studying specific neurological conditions.

Main Methods:

  • Review of recent research findings.
  • Focus on clinical syndromes including blindsight, visual agnosia, and visual neglect.

Main Results:

  • Perception-awareness dissociations are observed in conditions like blindsight, where individuals can respond to visual stimuli without conscious visual experience.
  • Covert recognition in visual agnosia demonstrates intact object recognition pathways despite impaired conscious perception.
  • Visual neglect highlights disruptions in spatial awareness, impacting perception of stimuli in affected hemifields.

Conclusions:

  • These syndromes provide valuable models for dissecting the neural basis of awareness.
  • Further research into these dissociations is crucial for advancing our understanding of consciousness and its neural correlates.

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