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Relationship between epileptogenesis and morphological changes in the cerebral cortex

A Yu Stepanenko1, N A Arkhipova, L V Shishkina

  • 1N. N. Burdenko Institute of Neurosurgery, Russian Academy of Medical Sciences, Moscow, Russia. ast@nsi.ru

Bulletin of Experimental Biology and Medicine
|April 17, 2010
PubMed

Insights

This study links microdysgenesis, a brain cytoarchitectonic disorder, to the development of epileptogenic zones in temporal epilepsy. Complete removal of these zones, showing microdysgenesis, improves surgical outcomes for drug-resistant epilepsy.

Area of Science:

  • Neuroscience
  • Neuropathology
  • Epileptology

Background:

  • Epileptogenic zones are critical for understanding and treating epilepsy.
  • Cytoarchitectonic abnormalities, termed microdysgenesis, are implicated in neurological disorders.
  • The precise relationship between microdysgenesis and epileptogenesis remains an area of investigation.

Purpose of the Study:

  • To investigate the pathogenetic relationship between microdysgenesis and the formation of epileptogenic zones.
  • To evaluate the impact of microdysgenesis on surgical treatment outcomes for drug-resistant temporal epilepsy.

Main Methods:

  • Clinical case series of 29 patients with drug-resistant temporal epilepsy undergoing surgery.
  • Intraoperative electrocorticography (ECoG) to identify epileptogenic zones.
  • Histological examination of resected cortical tissue to detect microdysgenesis.

Main Results:

  • All resected cortical specimens exhibited signs of microdysgenesis.
  • A correlation was found between the completeness of epileptogenic zone removal and successful surgical treatment.
  • Microdysgenesis was consistently present in the zones of regular epileptic activity.

Conclusions:

  • Microdysgenesis is a common finding in the epileptogenic zones of patients with drug-resistant temporal epilepsy.
  • Surgical resection of microdysgenetic tissue within the epileptogenic zone is crucial for seizure control.
  • These findings suggest a significant pathogenetic role for microdysgenesis in the generation of epileptic activity.

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