Altered effective connectivity during cognitive distancing in cognitive behavioral therapy nonresponders with depression.
Sabrina Golde, Gregory Gutmann, Ryszard Auksztulewicz et al.
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In 30 seconds
This clinical trial analysis examined whether pretreatment brain connectivity during cognitive distancing was associated with cognitive behavioral therapy (CBT) response in 77 outpatients with major depressive disorder. Participants underwent fMRI before 25 CBT sessions; effective connectivity was estimated across a 10-region network. Responders showed greater distancing-related modulation along a prefrontal-to-superior frontal/pre-supplementary motor pathway, while nonresponders showed greater amygdala-to-ventrolateral prefrontal modulation and reduced dorsolateral prefrontal self-inhibition. Connectivity measures predicted response in cross-validation (r = .21-.31, p < .05), but their added predictive value beyond baseline clinical measures was modest.
Key findings
- Responders showed greater relative modulation along a dorsomedial-to-ventrolateral prefrontal-to-superior frontal/pre-supplementary motor area cascade during distancing.
- Nonresponders showed greater amygdala-to-ventrolateral prefrontal connectivity modulation and decreased dorsolateral prefrontal self-inhibition during negative picture processing.
- Distancing-related connectivity effects exceeded 99% posterior probability and predicted response in cross-validation (r = .21-.31, p < .05).
- Incremental predictive value beyond baseline clinical measures was modest.
Why it matters
The findings link differences in neural control during cognitive reappraisal with subsequent CBT response, offering a possible mechanistic account of why some patients improve less with cognitive interventions. They also indicate that connectivity measures alone may have limited added value over clinical information, so their potential role in prediction would need to be assessed alongside other measures.
What to keep in mind
Predictive value beyond baseline clinical measures was modest; the authors state that prospective replication is needed.