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Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients
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Frontal lobe epilepsy: clinical seizure characteristics and localization with ictal 99mTc-HMPAO SPECT

A S Harvey1, I J Hopkins, J M Bowe

  • 1Department of Neurology, Royal Children's Hospital, Parkville, Australia.

Neurology
|October 1, 1993
PubMed

Insights

Ictal SPECT accurately identified frontal lobe epilepsy (FLE) seizure origins in 91% of children. This imaging technique helps pinpoint seizure locations and understand their clinical manifestations.

Area of Science:

  • Neurology
  • Nuclear Medicine
  • Epileptology

Background:

  • Frontal lobe epilepsy (FLE) presents diagnostic challenges.
  • Accurate localization of seizure onset is crucial for effective treatment.

Purpose of the Study:

  • To evaluate the utility of ictal technetium-99m hexamethyl propylene-amine-oxime single-photon emission computed tomography (SPECT) in localizing seizures in children with FLE.
  • To correlate SPECT findings with electroclinical features and anatomical locations within the frontal lobe.

Main Methods:

  • 22 children with suspected FLE underwent ictal SPECT using 99mtechnetium hexamethyl propylene-amine-oxime.
  • SPECT findings were correlated with electroencephalography (EEG) and clinical semiology.
  • Interictal SPECT was also performed for comparison.

Main Results:

  • Ictal SPECT showed unilateral frontal hyperperfusion in 91% of patients, concordant with electroclinical lateralization in 95%.
  • Specific frontal regions (frontopolar, orbitofrontal) showed distinct clinical associations.
  • Interictal SPECT demonstrated hypoperfusion in only 9% of cases, highlighting the superiority of ictal imaging.

Conclusions:

  • Ictal SPECT is a valuable tool for localizing seizures in children with intractable FLE.
  • SPECT findings advance the understanding of in vivo anatomico-clinical relationships in frontal lobe seizures.

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