Connectivity supporting attention in children with attention deficit hyperactivity disorder

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Intra-subject variability (ISV) is a key deficit in Attention Deficit Hyperactivity Disorder (ADHD).
• ISV is potentially linked to the cingulo-opercular network (CON) for task control and the default mode network (DMN) for attention lapses.

Purpose of the Study:

• To investigate atypical brain connectivity supporting attentional control in children with ADHD.
• To examine group differences in network connectivity (CON and DMN) and their association with attentional control.

Main Methods:

• Compared brain connectivity in 50 children with ADHD and 50 typically developing (TD) controls (ages 8-12).
• Analyzed full-brain connection strength within and between CON and DMN.
• Examined brain-behavior associations with attentional control measures, controlling for other cognitive factors.

Main Results:

• Children with ADHD exhibited hyper-connectivity within both CON and DMN.
• Greater DMN-occipital anti-correlation correlated with better attentional control across groups, but more strongly in TD children.
• Increased CON-DMN anti-correlation was linked to better attentional control in ADHD, but worse in TD children, particularly involving the medial frontal cortex.

Conclusions:

• Attentional control in ADHD involves distinct network connectivity patterns compared to TD children.
• While CON-DMN anti-correlation benefits attention in ADHD, DMN-occipital anti-correlation is more critical for attention in TD individuals.
• Findings highlight specific neural circuit differences underlying attentional control deficits in pediatric ADHD.