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Paradoxical normalization in childhood epilepsy

N Amir1, V Gross-Tsur

  • 1Florence and Martin Miller EEG Diagnostic Unit, Shaare Zedek Medical Center, Jerusalem, Israel.

Epilepsia
|September 1, 1994
PubMed

Insights

Five children with refractory epilepsy experienced paradoxical normalization (PN), a rare phenomenon of seizure cessation and EEG improvement, following changes in anti-epileptic drug (AED) regimens. This study highlights PN in young children, presenting with psychiatric symptoms like psychosis and autistic withdrawal.

Area of Science:

  • Pediatric Neurology
  • Child Psychiatry
  • Neuropharmacology

Background:

  • Refractory epilepsy in children presents significant treatment challenges.
  • Paradoxical normalization (PN), characterized by seizure cessation and EEG improvement, is typically observed in adolescents and adults after prolonged poorly controlled seizures.
  • The underlying mechanisms of PN, particularly in pediatric populations, remain incompletely understood.

Purpose of the Study:

  • To report the occurrence of paradoxical normalization (PN) in young children with refractory epilepsy.
  • To describe the clinical presentation and latency of PN in pediatric cases.
  • To explore potential contributing factors, including anti-epileptic drug (AED) regimen changes.

Main Methods:

  • Case series reporting on five children aged 2.5 to 9 years with refractory epilepsy.
  • Observation of clinical and electroencephalographic (EEG) changes following modifications to anti-epileptic drug (AED) regimens.
  • Documentation of psychiatric and behavioral manifestations associated with seizure cessation.

Main Results:

  • Five children developed paradoxical normalization (PN) after AED regimen changes.
  • Latency between first seizure and psychosis ranged from 1.9 to 7.0 years.
  • Behavioral manifestations included schizophrenialike psychosis, autistic withdrawal, and organic mental syndrome.

Conclusions:

  • Paradoxical normalization (PN) can occur in young children with refractory epilepsy, challenging previous observations limited to older age groups.
  • Changes in anti-epileptic drug (AED) regimens may precipitate PN in susceptible pediatric patients.
  • Drug-induced alterations in neurotransmitter systems are hypothesized as a potential mechanism for PN in this pediatric cohort.

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