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Brain glucose utilization in band heterotopia: synaptic activity of "double cortex"
A G De Volder1, J F Gadisseux, C J Michel
1Department of Pediatric Neurology, University of Louvain, Brussels, Belgium.
Pediatric Neurology
|November 1, 1994
Summary
This study investigated brain glucose metabolism in patients with double cortex, a rare brain malformation. Findings show heterotopic gray matter exhibits significant synaptic activity, even with epilepsy.
Area of Science:
- Neuroscience
- Neurology
- Medical Imaging
Background:
- Diffuse band heterotopia, or 'double cortex,' is a rare neuronal migration disorder.
- Patients often present with epilepsy, posing diagnostic and therapeutic challenges.
- Understanding the functional state of heterotopic neurons is crucial for epilepsy management.
Observation:
- Two patients with double cortex and seizure disorders underwent positron emission tomography (PET) with fluorodeoxyglucose.
- Magnetic resonance imaging (MRI) confirmed symmetric bands of ectopic gray matter without focal abnormalities.
- Glucose metabolism was assessed in the heterotopic gray matter and the overlying normal cortex.
Findings:
- Positron emission tomography revealed comparable glucose utilization in both heterotopic and normal cortical gray matter.
- Glucose uptake in the heterotopic gray matter was similar, and in some cases, higher than in the normal cortex.
- These metabolic patterns suggest persistent synaptic activity within the heterotopic neurons.
Implications:
- The findings indicate that heterotopic neurons in double cortex maintain significant functional synaptic activity.
- This activity appears independent of epilepsy duration or disease onset.
- Further research into the functional role of these neurons could inform epilepsy treatment strategies for affected individuals.