Psychopathological network for early-onset post-stroke depression symptoms

Area of Science:

• Neuroscience
• Psychiatry
• Medical Imaging

Background:

• Post-stroke depression (PSD) is a complex condition with interacting symptoms.
• The neural mechanisms and symptom interactions in PSD require further investigation.
• Understanding early-onset PSD pathogenesis is crucial.

Purpose of the Study:

• To investigate the neuroanatomical substrates of individual PSD symptoms (PSDS).
• To explore the interactions among PSDS.
• To understand the pathogenesis of early-onset PSD.

Main Methods:

• Recruited 861 first-ever stroke patients within 7 days poststroke.
• Assessed 13 PSDS using the Hamilton Depression Rating Scale at 2 weeks poststroke.
• Utilized voxel-based lesion-symptom mapping (VLSM) to correlate lesion locations with PSDS severity.

Main Results:

• Depressed mood, psychiatric anxiety, and loss of interest identified as central PSDS.
• Lesions in bilateral basal ganglia and capsular regions associated with higher overall PSDS severity.
• These brain regions also correlated with severities of the three central PSDS.

Conclusions:

• Early-onset PSD exhibits stable interactions among symptoms, with specific symptoms being central.
• Strategic lesion locations may indirectly cause other PSDS through the symptom network, increasing overall severity.
• This highlights the importance of targeted lesion location in PSD pathogenesis.