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Related Experiment Videos

Progressive neocortical damage in epilepsy.

Rebecca S N Liu1, Louis Lemieux, Gail S Bell

  • 1Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, London, United Kingdom.

Annals of Neurology
|February 26, 2003
PubMed
Summary

Neocortical atrophy, or brain tissue loss, is common in epilepsy patients, affecting over half with chronic epilepsy. Age and multiple antiepileptic drugs increase this risk.

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Area of Science:

  • Neurology
  • Neuroimaging
  • Epilepsy Research

Background:

  • Epilepsy is a chronic neurological disorder characterized by recurrent seizures.
  • Neocortical atrophy, a loss of brain tissue, is a potential consequence of epilepsy.
  • Understanding the patterns and risk factors of neocortical atrophy is crucial for patient management.

Purpose of the Study:

  • To investigate the incidence and patterns of neocortical atrophy in epilepsy.
  • To identify factors associated with the development of neocortical atrophy in epilepsy patients.
  • To compare neocortical changes in chronic epilepsy, newly diagnosed epilepsy, and control groups.

Main Methods:

  • Prospective, longitudinal follow-up study over 3.5 years.
  • Serial magnetic resonance imaging (MRI) scans analyzed using image subtraction.

Related Experiment Videos

  • Quantification of diffuse and focal neocortical volume loss with automated segmentation and a brain atlas.

    • Main Results:

    • New focal or generalized neocortical volume loss occurred in 54% of chronic epilepsy patients, 39% of newly diagnosed patients, and 24% of controls.
    • Patients with chronic epilepsy showed a significantly higher likelihood of developing neocortical atrophy compared to controls.
    • Age and exposure to multiple antiepileptic drugs were identified as risk factors for neocortical atrophy; seizure history was not a significant factor.

    Conclusions:

    • Focal and generalized neocortical atrophy is a common finding in chronic epilepsy, often widespread and not confined to the seizure focus.
    • Observed neocortical changes in controls may represent physiological aging.
    • The findings suggest that epilepsy-related brain changes may involve extensive neural networks.