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Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.

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Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection
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Published on: March 10, 2021

Spatial neglect during electrocortical stimulation mapping in the right hemisphere.

Jonathan T Kleinman1, Jehuda P Sepkuty, Argye E Hillis

  • 1Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA.

Epilepsia
|July 25, 2007
PubMed
Summary

Electrocortical stimulation mapping (ESM) before epilepsy surgery can predict spatial processing deficits from brain resection. This technique may help prevent postoperative impairments in temporal and parietal regions.

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Area of Science:

  • Neuroscience
  • Neurosurgery
  • Cognitive Psychology

Background:

  • Assessing spatial processing is crucial before epilepsy surgery.
  • Electrocortical stimulation mapping (ESM) is used to identify critical brain areas.

Observation:

  • Two patients undergoing epilepsy surgery had subdural electrodes placed in their nondominant hemisphere.
  • ESM was performed to map brain function before surgical resection.

Findings:

  • The first patient experienced mild hemispatial neglect during ESM of posterior temporal and inferior parietal areas, which were resected, leading to similar postoperative deficits.
  • The second patient showed marked hemispatial neglect during parietal area stimulation; these areas were preserved, and no neglect occurred post-surgery.

Implications:

  • ESM can effectively predict spatial processing deficits linked to cortical resection.
  • This method may aid in preventing postoperative impairments in right parietal or temporal resections.