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Physical exercise and voluntary hyperventilation in childhood absence epilepsy
E Esquivel1, M Chaussain, P Plouin
1Service de Neuropédiatrie, Hôpital St. Vincent de Paul, Paris, France.
Insights
Physical exercise may reduce absence seizures in children with epilepsy, while hyperventilation might increase them. Lowering blood pH correlates with fewer absence seizures, suggesting a link to neuronal excitability.
Area of Science:
- Neurology
- Pediatrics
- Epilepsy Research
Background:
- Absence epilepsy is a common epilepsy syndrome in children.
- Understanding triggers and modulators of absence seizures is crucial for management.
- Physical activity's role in epilepsy management requires further investigation.
Purpose of the Study:
- To compare the effects of physical exercise and voluntary hyperventilation on absence seizures in children.
- To investigate the relationship between physiological parameters and absence seizure frequency.
- To determine if physical activity is contraindicated for children with absence epilepsy.
Main Methods:
- Studied 18 children (12 with absence epilepsy, 6 controls) during rest, maximal physical exercise, recovery, and voluntary hyperventilation.
- Recorded EEG and ECG, measured respiratory parameters, and analyzed plasma levels of pH, lactate, and glucose.
- Correlated seizure frequency with physiological and biochemical markers.
Main Results:
- Physical exercise (PE) was associated with a decrease in absence seizures.
- Voluntary hyperventilation (VHPV) was associated with an increase in absence seizures.
- A significant positive correlation was found between lower plasma pH and fewer absence seizures, suggesting a link to neuronal excitability.
Conclusions:
- Children with absence epilepsy can be encouraged to participate in sports.
- Modulation of blood pH may influence absence seizure occurrence.
- Further research into the neurophysiological mechanisms linking pH and neuronal excitability in epilepsy is warranted.
Abstract:
The aim of this study was to compare the effects of a physical exercise test and of voluntary hyperventilation between controls and children with absence epilepsy. Eighteen children (6 controls and 12 epileptics) were studied during rest (R), a maximal physical exercise test (15 min; PE), recovery (REC) and voluntary hyperventilation (3 min; VHPV). EEG and ECG were recorded during the experiment; respiratory parameters were measured to quantify PE; plasma levels of pH, lactate, pyruvate, glucose and antiepileptic drugs were determined. A decrease in the number of absences was observed during PE whereas an increase was observed during VHPV. We found significant positive correlations between the number of children with absences, the total number of absences for each state, frequency of absences per minute and the corresponding mean plasma pH, which demonstrate that the lower the pH is, the fewer absences occur. On the other hand, there was no relationship between the number of absences and the values of other parameters. Relations between variations of the plasma value of the pH, and thus the probable cerebral value of pH, and neuronal excitability are discussed. Our results indicate that children who suffer absence epilepsy should not be discouraged from sport practice.