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Related Experiment Videos

Periodic lateralized epileptiform discharges--a critical review

B Pohlmann-Eden1, D B Hoch, J I Cochius

  • 1Department of Neurology, Mannheim Hospital, University of Heidelberg, Germany.

Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society
|November 1, 1996
PubMed
Summary

Periodic lateralized epileptiform discharges (PLEDs) are linked to stroke, often indicating focal hyperexcitability. These EEG patterns may represent a dynamic state influencing seizure occurrence in stroke patients.

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Area of Science:

  • Neuroscience
  • Clinical Neurology
  • Epileptology

Background:

  • Periodic lateralized epileptiform discharges (PLEDs) are transient electroencephalographic (EEG) patterns requiring comprehensive literature review.
  • Understanding PLEDs is crucial for diagnosing and managing neurological conditions, particularly those associated with stroke.

Observation:

  • Retrospective studies highlight stroke as the primary cause of PLEDs, with a significant association with seizures.
  • Functional neuroimaging suggests PLEDs may signify focal hyperexcitability within the ischemic penumbra of stroke.

Findings:

  • PLEDs are interpreted as an EEG signature of a dynamic pathophysiological state.
  • This state involves unstable neurobiological processes creating an ictal-interictal continuum.

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  • Factors like neuronal injury, seizure propensity, and metabolic derangements influence seizure manifestation.

    • Implications:

    • Further prospective, controlled studies with continuous EEG monitoring are essential.
    • Understanding PLED incidence, dynamics, and clinical relevance is critical.
    • This research can advance the management of stroke-related neurological events.