Coordinate Network Mapping of Focal Brain Volume Differences in ADHD Reveals Common Patterns That Lack Specificity: A...

Area of Science:

• Neuroscience
• Psychiatry
• Brain Imaging

Background:

• Attention-deficit/hyperactivity disorder (ADHD) is associated with brain volume changes, but findings lack consistent localization.
• Diagnostic heterogeneity in ADHD may explain discrepancies, or ADHD might involve network alterations rather than regional ones.

Purpose of the Study:

• To test the hypothesis that ADHD is associated with brain network alterations, not just regional volume changes.
• To compare traditional Anatomic Likelihood Estimate (ALE) with Coordinate Network Mapping (CNM) for ADHD neuroimaging data.

Main Methods:

• Performed ALE analysis on 38 studies comparing ADHD and healthy controls.
• Applied CNM to generate connectivity maps and identify commonalities across studies.
• Compared ADHD network maps with control groups and random data.

Main Results:

• ALE analysis showed no significant spatial convergence for ADHD.
• CNM identified a consistent brain network associated with ADHD, linked to reward and action-mode networks.
• This ADHD-associated network was not distinguishable from networks found in control groups.

Conclusions:

• The identified brain network, while plausible for ADHD symptoms, is not specific to the disorder.
• Findings suggest ADHD may involve large-scale brain networks rather than localized regions.
• Future ADHD research should consider symptom-level analysis due to non-specific network findings.