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Author Spotlight: Advancing Pediatric Epilepsy Surgery in Children Through Novel Biomarkers and Enhanced Localization
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Electrical stimulation mapping of the visual cortex for epilepsy surgery.

Jacques Jonas1, Jérôme Aupy2, Ana Maria Petrescu3

  • 1Université de Lorraine, CHRU-Nancy, Service de Neurologie, Nancy, France; Université de Lorraine, IMoPA, UMR CNRS 7365, Nancy, France.

Neurophysiologie Clinique = Clinical Neurophysiology
|April 5, 2026
PubMed
Summary

Direct electrical stimulation (ES) in epilepsy surgery has limited predictive value for visual field defects but may help predict deficits in face recognition and reading. More systematic ES use and prospective studies are needed to improve visual function prediction.

Keywords:
Brain mappingDirect electrical stimulationEpilepsy surgeryFace identity recognitionReadingSEEG

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Area of Science:

  • Neuroscience
  • Neurosurgery
  • Ophthalmology

Background:

  • Epilepsy surgery aims to minimize post-operative sensory, motor, and cognitive deficits.
  • Direct electrical stimulation (ES) is crucial in epilepsy surgery but its utility for predicting visual deficits is unclear, especially in posterior epilepsy.

Purpose of the Study:

  • To review ES findings in the visual cortex.
  • To assess ES's predictive value for visual functions.
  • To propose recommendations for improving ES's predictive value.

Main Methods:

  • Review of ES findings in the primary visual cortex, and ventral and dorsal streams.
  • Focus on face recognition and reading functions within the ventral stream.
  • Assessment of current literature on ES and visual function prediction.

Main Results:

  • ES has limited predictive utility for visual field defects, except in the primary visual cortex.
  • ES may predict deficits in face recognition and reading, but requires more prospective data.
  • Well-designed tasks are crucial for detecting critical regions for these functions.

Conclusions:

  • Systematic use of ES in the visual cortex with tailored tasks is advocated.
  • Improved evaluation of ES's predictive value through prospective group studies is recommended.
  • Specific attention to face recognition tasks is needed for the right occipito-temporal cortex.