Gender differences in anomalous subcortical morphology for children with ADHD

Area of Science:

• Neuroscience
• Developmental Psychology
• Pediatrics

Background:

• Previous research indicates subtle reductions in fronto-striatal regions in children with Attention Deficit Hyperactivity Disorder (ADHD).
• Limited studies have explored subcortical structure volume and lateralization in pediatric ADHD, with minimal focus on gender differences.

Purpose of the Study:

• To investigate subcortical brain structure morphology in children with and without ADHD.
• To examine the association between ADHD symptoms and subcortical structures, comparing boys and girls to typically developing (TD) peers.
• To explore gender-specific patterns in subcortical neuroanatomy related to ADHD.

Main Methods:

• Utilized data from 185 children aged 7-14 years from the ADHD-200 Consortium.
• Conducted volumetric analyses of subcortical structures.
• Performed asymmetry analyses to assess brain lateralization.

Main Results:

• Boys with ADHD exhibited reduced volumes in the accumbens, amygdala, and hippocampus compared to TD boys.
• No significant volumetric differences were found between girls with ADHD and TD girls in any examined subcortical structure.
• Right lateralization compressions in the thalamus were observed in ADHD boys relative to TD boys.

Conclusions:

• Findings suggest a gender-dimorphic pattern of subcortical structural differences in pediatric ADHD.
• These neurobiological variations may underlie gender-specific symptom presentation, particularly increased hyperactivity/impulsivity in boys with ADHD.