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Related Experiment Video

Updated: Jul 4, 2025

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Pan-cortical electrophysiologic changes underlying attention.

Ronald P Lesser1,2, W R S Webber3, Diana L Miglioretti4,5

  • 1Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA. rl@jhmi.edu.

Scientific Reports
|February 1, 2024
PubMed
Summary
This summary is machine-generated.

Cognitive tasks ending afterdischarges showed widespread brain coherence changes. These effects varied by time, distance, and frequency, suggesting broader therapeutic targets for epilepsy and other neurological disorders.

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Area of Science:

  • Neuroscience
  • Epilepsy Research
  • Cognitive Neuroscience

Background:

  • Previous work indicated pan-cortical effects when cognitive tasks conclude afterdischarges.
  • Understanding these widespread effects is crucial for developing effective neurological therapies.

Purpose of the Study:

  • To analyze wavelet cross-coherence changes during cognitive tasks that terminate afterdischarges.
  • To investigate variations in coherence across different time segments and inter-electrode distances.

Main Methods:

  • Studied 12 patients with intractable epilepsy.
  • Analyzed data from 970 implanted electrode contacts and 39,871 contact combinations.
  • Utilized wavelet cross-coherence to assess changes during cognitive tasks ending afterdischarges.

Main Results:

  • Coherence varied similarly across the cortex but showed gradations with time, distance, and frequency.
  • Coherence decreased relative to baseline over time, then increased towards baseline as afterdischarges ended.
  • Decreases in coherence were most pronounced at shorter inter-contact distances and diminished with increasing distance.

Conclusions:

  • Findings suggest future therapies for intractable epilepsy could target regions beyond seizure onset zones and later in seizure evolution.
  • Similar therapeutic considerations may apply to other neurological disorders.
  • Cognitive tasks induce pan-cortical coherence changes potentially involved in attention mechanisms.