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Weigh(t)ing for awareness

A Chatterjee1, K A Thompson

  • 1Department of Neurology, University of Alabama at Birmingham.

Brain and Cognition
|September 12, 1998
PubMed
Summary
This summary is machine-generated.

Weight perception can be altered by brain damage. Right parietal lobe damage impaired weight perception, especially when lifting with both hands simultaneously, indicating a split in awareness.

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Area of Science:

  • Neuroscience
  • Perception Science

Background:

  • Investigating the neural underpinnings of weight perception and somatosensation.
  • Examining the role of the right hemisphere in processing sensory information.

Observation:

  • Two patients with right hemisphere brain damage were studied for weight perception.
  • One patient with right frontal damage showed no bias in weight judgment.
  • A patient with right parietal damage exhibited altered weight perception, particularly for left-sided stimuli.

Findings:

  • Right parietal damage led to reporting left-sided weights as lighter.
  • Psychophysical analysis revealed dampened awareness of weight increases on the left.
  • Simultaneous bilateral weight lifting abolished awareness of left-sided weight changes, indicating a profound sensory deficit.

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Implications:

  • Suggests distinct roles for right frontal and parietal lobes in weight perception.
  • Highlights the potential for somatosensory processing deficits following brain injury.
  • Demonstrates a unique dissociation between motor engagement and sensory awareness in a patient with right parietal damage.