Key result
High depressive symptoms were associated with significantly increased occupancy of a functional brain state connecting the default mode, memory retrieval, and frontoparietal networks (16.1% vs 9.8%, p-FDR = 0.012).
Why the study?
Recent progress has characterized whole-brain functional connectivity dynamically rather than statically, but its validity for cognitive sciences remains under debate.
Cross-Sectional (n=69)
No
Standardized Mean Difference: 0.77
Absolute Event Rate: 16.1% vs 9.8%
p-value: p=0.012
Dynamic functional connectivity analysis reveals distinct temporal configurations of brain networks, particularly involving the precuneus, associated with depressive symptoms.
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Suggests neuroimaging correlates of depressive symptoms; hypothesis-generating and requires longitudinal validation before clinical relevance.
Alonso et al. (2020) conducted a cross-sectional in Depressive symptoms (n=69). High depressive symptoms (MDI > 20) vs. Low depressive symptoms (MDI ≤ 20) was evaluated on Occupancy of PL state 3 (connecting default mode, memory retrieval, and frontoparietal networks) (Hedges' g 0.77, p=0.012). High depressive symptoms were associated with significantly increased occupancy of a functional brain state connecting the default mode, memory retrieval, and frontoparietal networks (16.1% vs 9.8%, p-FDR = 0.012).
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