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[Nocturnal polysomnogram in childhood autism without epilepsy]
J R Valdizán-Usón1, B Abril-Villalba, M Méndez-García
1Servicio de Neurofisiolog a Clínica, Hospital Universitario Miguel Servet, Zaragoza, España. josevaldizan@terra.es
Insights
Autistic children exhibit reduced sleep duration and frontal epileptiform discharges, suggesting these may be intrinsic to autism spectrum disorder. This finding may relate to social experience alterations in autistic individuals.
Area of Science:
- Neuroscience
- Developmental Psychology
- Sleep Medicine
Context:
- Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterized by social interaction and communication deficits.
- Sleep disturbances are frequently reported in individuals with ASD, but their specific characteristics and underlying mechanisms require further investigation.
- The relationship between sleep organization, epileptiform activity, and core ASD symptoms remains an area of active research.
Purpose:
- To investigate the presence of epileptiform discharges during sleep.
- To analyze the organization and duration of nocturnal sleep in children with ASD.
- To compare sleep patterns and epileptiform activity between children with ASD and typically developing controls.
Summary:
- This study analyzed nocturnal polysomnograms of 21 children with ASD (ages 4-12) and a control group.
- Children with ASD had fewer sleep cycles (max 4 vs. 5-6) and increased slow-wave sleep phases.
- Epileptiform discharges, predominantly frontal, were observed in 66% of ASD subjects.
Impact:
- Findings suggest reduced sleep duration and frontal epileptiform discharges are intrinsic features of ASD.
- These sleep alterations may be linked to the underlying neurobiology of autism.
- Understanding these parameters could offer insights into the qualitative alterations in social experiences observed in ASD.
Aims:
To evaluate the presence of epileptiform discharges and the organisation of nocturnal sleep of autistic children without nocturnal polysomnographic epileptic seizures.
Subjects And Methods:
Cross section analysis.
Subjects:
21 boys and girls with autistic spectrum using DSM IV criteria between the ages of 4 and 12, compared with a control group made up of normal children of the same ages.
Methods:
nocturnal polysomnogram with a minimum efficiency of 75%.
Analysis:
t test to compare the cycles and phases of sleep with significance p< 0.05.
Results:
SUBJECTS presented a maximum of four sleep cycles compared with five or six in the control subjects. From the first third of the night onwards there was an increase in the slowest phases. 66% presented epileptiform paroxysmal discharges, all of which originated in the anterior half of the brain.
Conclusion:
Sleep is not destructured, but it is reduced in length, with epileptiform paroxysms of predominantly frontal origin. This could indicate that these two parameters are intrinsic to the autistic spectrum, as well as indicating a more focused origin of the generalised picture which is possibly closely related with the qualitative alteration of the social experiences of these children.