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Alternating hemiplegia in childhood: a cross-sectional study
S Nevsímalová1, J Dittrich, M Havlová
1Department of Neurology, 1st Medical Faculty, Charles University, Prague, Czech Republic.
Brain & Development
|May 1, 1994
Summary
Alternating hemiplegia of childhood (AHC) patients show progressive neurological decline and mitochondrial dysfunction. Despite clinical evidence, the exact cause of AHC remains unknown.
Area of Science:
- Neurology
- Pediatrics
- Metabolic Disorders
Background:
- Alternating hemiplegia of childhood (AHC) is a rare neurodevelopmental disorder.
- Understanding the underlying pathophysiology of AHC is crucial for effective management.
Observation:
- Progressive intellectual decline and motor function disturbances (pyramidal, extrapyramidal, cerebellar) were observed in all six AHC patients.
- Abnormalities in multimodal evoked potentials, sleep patterns, and HMPAO-SPECT scans correlated with clinical severity.
- Older patients exhibited elevated plasma lactate, increased lactate:pyruvate ratio, and higher inorganic phosphate levels detected via 31P MR spectroscopy.
Findings:
- The observed metabolic and neurophysiological changes suggest a potential secondary mitochondrial deficit in AHC.
- Despite these functional and metabolic indicators, no specific pathological changes were identified in muscle, skin, or buccal biopsies.
Implications:
- The findings support a mitochondrial hypothesis in AHC, guiding further research into metabolic pathways.
- The lack of specific diagnostic markers in biopsies highlights the need for advanced neuroimaging and biochemical analyses for AHC diagnosis.
- Further investigation is required to elucidate the precise etiology of AHC and develop targeted therapies.