Age-Dependent Changes in the Propofol-Induced Electroencephalogram in Children With Autism Spectrum Disorder

Area of Science:

• Neuroscience
• Anesthesiology
• Developmental Psychology

Background:

• Autism spectrum disorder (ASD) is associated with GABAergic signaling deficits.
• Patients with ASD often require sedation or general anesthesia, necessitating understanding of drug responses.
• Propofol, a GABAergic drug, is commonly used for sedation and anesthesia.

Purpose of the Study:

• To investigate differences in propofol-induced electroencephalogram (EEG) responses between ASD and neurotypical (NT) patients.
• To compare age-related changes in alpha and slow oscillation power during propofol anesthesia in ASD and NT individuals.
• To analyze the incidence of burst suppression in ASD patients under propofol anesthesia.

Main Methods:

• Prospective observational study comparing 4-channel frontal EEG during propofol anesthesia.
• Participants included ASD and NT individuals aged 2-30 years.
• Bayesian methods were used to compare propofol-induced EEG oscillations (alpha, slow) and burst suppression incidence.

Main Results:

• ASD patients exhibited higher initial slow oscillation power that declined with age, unlike NT patients.
• Frontal alpha power was initially lower in ASD patients and decreased with age.
• ASD patients showed a significantly higher incidence of burst suppression despite lower propofol doses.

Conclusions:

• ASD patients demonstrate unique propofol-EEG response patterns compared to NT individuals.
• Observed EEG changes in ASD patients may indicate accelerated neuronal aging.
• Findings suggest potential for tailored anesthetic practices and deeper insights into ASD neurobiology.