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Cortical thinning in preschoolers with maladaptive guilt
Meghan Rose Donohue1, Rebecca Tillman1, Deanna M Barch2
1Department of Psychiatry, Washington University School of Medicine, 4444 Forest Park Avenue, Suite 2500, 63110 St. Louis, MO, USA.
Psychiatry Research. Neuroimaging
|October 12, 2020
Summary
Preschoolers with maladaptive guilt show thinner dorsomedial prefrontal cortex (dmPFC) gray matter. This finding identifies a specific structural brain biomarker for early signs of depression in young children.
Area of Science:
- Neuroscience
- Developmental Psychology
- Child Psychiatry
Background:
- Maladaptive guilt is a key symptom of early-onset depression.
- Previous research links maladaptive guilt to brain structure changes in older children.
- The neural basis of maladaptive guilt in preschoolers remains unexamined.
Purpose of the Study:
- To investigate the structural neural correlates of maladaptive guilt in preschoolers.
- To identify potential early brain biomarkers for preschool-onset depression.
Main Methods:
- Utilized a pooled sample of 76 children aged 3–6 years.
- Employed magnetic resonance imaging (MRI) to assess brain structure.
- Conducted diagnostic interviews including clinician ratings of maladaptive guilt.
Main Results:
- Preschoolers with maladaptive guilt exhibited significantly thinner dorsomedial prefrontal cortex (dmPFC) compared to controls.
- dmPFC thickness was specifically associated with maladaptive guilt, not overall depressive severity or other symptoms.
- No significant differences in anterior insula (AI) gray matter volume or thickness, or dmPFC gray matter volume, were found.
Conclusions:
- This study identifies the first structural brain biomarker for a specific depressive symptom in preschoolers.
- Findings suggest dmPFC thinning is a potential neural marker for maladaptive guilt in early childhood.
- Results may enhance neurobiological models of depression development and aid early detection.
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