Cortical thickness in symptomatic and asymptomatic bipolar offspring

Area of Science:

• Neuroscience
• Psychiatry
• Developmental Psychology

Background:

• Children of parents with bipolar disorder have an elevated risk for psychiatric disorders.
• The underlying neurobiological factors contributing to this increased risk are not fully understood.

Purpose of the Study:

• To investigate differences in gray matter integrity, specifically cortical thickness, between high-risk bipolar offspring (HRO) and healthy control offspring (HCO).
• To explore whether psychiatric symptoms in HRO are associated with distinct patterns of cortical thickness and age-related changes.

Main Methods:

• Utilized T1-weighted magnetic resonance imaging (MRI) to assess cortical thickness in HRO (with and without psychiatric symptoms) and HCO.
• Compared cortical thickness and the correlation between age and cortical thickness across the different groups.

Main Results:

• HRO exhibited reduced cortical thickness in temporal and frontal regions compared to HCO, irrespective of psychiatric symptoms.
• Symptomatic HRO showed further cortical thinning in frontal and somatosensory areas.
• Age-cortical thickness relationships differed, with negative correlations in HCO and positive correlations in HRO across several brain regions.

Conclusions:

• High-risk bipolar offspring demonstrate reduced cortical thickness during youth, even without current psychiatric symptoms.
• Specific cortical alterations, particularly in emotion processing regions, are more pronounced in symptomatic HRO.
• These findings highlight potential neurodevelopmental differences in individuals at high risk for bipolar disorder.