Anterior cingulate volume in pediatric bipolar disorder and autism

Area of Science:

• Neuroscience
• Child Psychiatry
• Radiology

Background:

• Pediatric bipolar disorder (BD) is associated with attention deficits.
• The anterior cingulate gyrus (ACG) is implicated in these attention deficits.
• Previous studies have not consistently controlled for age, medications, or IQ effects on ACG volume.

Purpose of the Study:

• To investigate ACG volume differences in children with BD compared to controls.
• To assess the influence of age, medications, and IQ on ACG volume in pediatric BD.
• To determine if ACG volume abnormalities could serve as a biomarker for pediatric BD.

Main Methods:

• Recruited participants: 16 children with BD, 24 with ASD, and 15 with no psychiatric diagnosis (NP).
• Utilized K-SADS, DSM-IV Autism/Asperger's Checklist, and ADI-R for psychiatric and autism evaluations.
• Performed brain MRI scans to segment and compare left and right ACG volumes, controlling for age and IQ.

Main Results:

• Significantly smaller left ACG volume observed in the BD group compared to NP (p=0.004) and ASD (p=0.006) groups.
• No significant differences in right ACG volume were found between groups.
• The observed ACG volume differences were independent of medication use and IQ.

Conclusions:

• Pediatric BD patients exhibit reduced left ACG volume relative to NP children and children with ASD.
• This finding supports and extends previous research on ACG abnormalities in pediatric BD.
• Left ACG volume reduction may represent a potential neuroimaging biomarker for pediatric bipolar disorder.