The relationship between cognition and functioning in Bipolar Disorder: An investigation using functional imaging...

Area of Science:

• Neuroscience
• Psychiatry
• Medical Imaging

Background:

• Psychosocial functioning significantly impacts bipolar disorder (BD) prognosis and quality of life.
• Understanding the neural underpinnings of psychosocial functioning in BD is crucial for targeted interventions.

Purpose of the Study:

• To investigate the brain's functional correlates of psychosocial functioning in individuals with BD.
• To examine neural activity during a working memory task in relation to functioning levels.

Main Methods:

• Functional magnetic resonance imaging (fMRI) and structural MRI were used in 31 euthymic BD patients and 31 healthy controls.
• Participants performed 1-back and 2-back versions of the n-back task.
• Psychosocial functioning was assessed using the Functional Assessment Short Test (FAST).

Main Results:

• BD patients exhibited overall activation differences and impaired de-activation in the medial frontal cortex compared to controls.
• Six clusters showed an inverse correlation between FAST scores and brain activation, notably in the dorsolateral prefrontal cortex, superior parietal cortex, and temporo-occipital regions.
• Cognitive and occupational functioning subdomains were most strongly associated with these brain activation patterns.

Conclusions:

• Poor psychosocial functioning in BD is associated with hypoactivation in cortical regions, including the fronto-parietal working memory network.
• These findings highlight the neural basis of functional impairments in BD and may inform future therapeutic strategies.