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Increased Segregation in Functional Connectivity Networks When Watching Unpleasant Arousing Videos: A Generalized
Yuqian Ni1, Xia Zheng2, Richard Betzel3
1The Media School, Indiana University Bloomington, Bloomington, Indiana, USA.
Brain Connectivity
|January 24, 2024
Summary
Viewing unpleasant, arousing videos significantly alters brain functional connectivity (FC), leading to increased network segregation, particularly in association systems. This suggests a shift in brain state due to highly aversive stimuli.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Affective Neuroscience
Background:
- Functional connectivity (FC) properties, including network integration and segregation, are linked to human behaviors like attention and motor tasks.
- Previous research indicates that attention increases integration, while simple motor tasks increase segregation.
Purpose of the Study:
- To investigate how viewing video clips varying in valence and arousal affects integration-segregation properties in task-based FC networks.
- To explore changes in brain network dynamics in response to different affective stimuli.
Main Methods:
- Analysis of an open dataset using generalized psychophysiological interaction (gPPI) analysis.
- Application of network analysis and community detection to examine brain network dynamics during video viewing.
- Categorization of videos based on affective valence (unpleasant/pleasant) and arousal (arousing/calm).
Main Results:
- Unpleasant arousing videos caused greater FC deviation from baseline (task-induced FC deviation [tiFCd]).
- These videos perturbed the brain into a more segregated state compared to other video types.
- Increased segregation was specifically observed in association systems, not sensorimotor systems.
Conclusions:
- Unpleasant arousing content induces a distinct brain state, potentially related to disengagement or heightened alertness.
- Combining gPPI analysis with community detection and network segregation measures enhances understanding of behavior-brain state links.
- Affective stimuli significantly influence brain network dynamics, particularly the balance between integration and segregation.
Keywords:
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