Resting electroencephalogram in attention deficit hyperactivity disorder: developmental course and diagnostic value

Area of Science:

• Neuroscience
• Developmental Psychology
• Psychiatry

Background:

• Attention Deficit Hyperactivity Disorder (ADHD) is a prevalent neurodevelopmental disorder.
• Understanding the electroencephalographic (EEG) underpinnings and developmental trajectories of ADHD is crucial for diagnosis and treatment.
• Previous research suggests potential EEG differences in ADHD, but findings across the lifespan remain debated.

Purpose of the Study:

• To investigate electroencephalographic (EEG) activity and its developmental course in individuals with ADHD throughout the lifespan.
• To assess the accuracy of EEG parameters in distinguishing ADHD patients from typically developing individuals.
• To explore potential EEG markers differentiating ADHD subtypes.

Main Methods:

• Comparison of 3-minute eyes-closed resting EEG data.
• Inclusion of 62 individuals diagnosed with ADHD (36 children, 26 adults) and 55 typically developing controls (30 children, 25 adults).
• Analysis of EEG activity, maturation, theta/beta ratio, and relative beta power across different age groups and ADHD subtypes.

Main Results:

• No significant differences in overall EEG activity or maturation were found between individuals with ADHD and typically developing controls.
• Persistent elevated theta/beta ratio and reduced relative beta power were observed in the ADHD inattentive subtype compared to the ADHD combined subtype and controls.
• EEG-based classification was unsuccessful for ADHD diagnosis but successful for age prediction.

Conclusions:

• EEG activity and maturation do not appear to differ between ADHD and typically developing individuals across the lifespan.
• Specific EEG patterns, such as elevated theta/beta ratio, may characterize certain ADHD subtypes, suggesting maturational deviations in a subgroup.
• Conventional EEG approaches may have limited clinical utility for diagnosing ADHD due to heterogeneity and lack of distinct diagnostic markers.