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Sex differences in adolescent ADHD: findings from concurrent EEG and EDA
Daniel F Hermens1, Michael R Kohn, Simon D Clarke
1The Brain Dynamics Centre, University of Sydney, Westmead Hospital, NSW, Australia. dher5793@mail.usyd.edu.au
Summary
Attention Deficit Hyperactivity Disorder (ADHD) presents differently in males and females. This study found distinct electroencephalography (EEG) and electrodermal activity (EDA) patterns, suggesting unique underlying psychophysiological processes for ADHD in each sex.
Area of Science:
- Neuroscience
- Psychiatry
- Human Physiology
Background:
- Attention Deficit Hyperactivity Disorder (ADHD) is diagnosed more frequently in males than females.
- Understanding sex-based differences in ADHD presentation is crucial for effective diagnosis and treatment.
- Psychophysiological markers may offer insights into ADHD's varied expression.
Purpose of the Study:
- To investigate psychophysiological differences between males and females with ADHD.
- To determine if electroencephalography (EEG) and electrodermal activity (EDA) can differentiate ADHD presentation by sex.
- To explore potential underlying mechanisms of ADHD in males and females.
Main Methods:
- Simultaneous recording of quantitative EEG and EDA in 70 adolescents with ADHD (48 males, 22 females) and matched controls.
- Data collected during a 2-minute eyes-closed resting condition.
- Analysis focused on EEG theta activity and EDA measures.
Main Results:
- ADHD males exhibited widespread increases in EEG theta activity.
- ADHD females showed localized frontal theta enhancement and reduced electrodermal activity (EDA) decrement rate.
- These sex-specific psychophysiological differences were independent of ADHD subtype.
Conclusions:
- Distinct psychophysiological processes may underlie ADHD in males and females.
- ADHD in males aligns with a developmental deviation model.
- ADHD in females may be better explained by an arousal model incorporating central and autonomic functions.