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The 2008 Judith Hoyer lecture: epilepsy in children: listening to mothers

Gregory L Holmes1

  • 1Department of Neurology, Center for Neuroscience at Dartmouth, Dartmouth Medical School, Hanover, NH, USA. Gregory.L.Holmes@Dartmouth.edu

Epilepsy & Behavior : E&B
|September 2, 2009
PubMed

Insights

Pediatric epilepsy, more common than in adults, involves unique developmental mechanisms. Animal models reveal how early seizures impact brain development and cognition, guiding treatment strategies.

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Epileptology

Background:

  • Epilepsy incidence is higher in children than adults.
  • Pediatric epilepsy presents unique challenges for parents regarding cause, treatment, and prognosis.
  • Some children with epilepsy are refractory to treatment and experience cognitive decline.

Purpose of the Study:

  • To explore mechanisms of high seizure incidence in developing brains.
  • To understand age-dependent seizure-induced damage in young brains.
  • To correlate early-life seizures with cognitive deficits and evaluate antiepileptic drug effects.

Main Methods:

  • Utilizing animal models to investigate developmental seizure susceptibility.
  • Examining the role of GABAergic depolarizing effects due to high intracellular chloride in immature neurons.
  • Assessing behavioral consequences, such as impaired spatial cognition, using single-cell hippocampal recordings.
  • Reviewing studies on antiepileptic drug effects on cognition and apoptosis.

Main Results:

  • Immature neurons exhibit increased seizure susceptibility due to depolarizing GABA effects.
  • Recurrent seizures in young brains lead to aberrant neuroplasticity, including mossy fiber sprouting and reduced neurogenesis.
  • Antiepileptic drugs, even at therapeutic doses, may impair cognition and increase apoptosis.
  • Early-life seizures are linked to impaired spatial cognition.

Conclusions:

  • Animal models provide crucial insights into the mechanisms underlying pediatric epilepsy and seizure-induced brain damage.
  • Understanding these mechanisms can guide clinicians in discussing prognosis and treatment with parents.
  • Further research is needed to balance epilepsy management with potential cognitive side effects of treatments.

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