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Published on: August 5, 2014
Lacking social support is associated with structural divergences in hippocampus-default network co-variation patterns
Chris Zajner1, R Nathan Spreng1, Danilo Bzdok1,2,3
1McConnell Brain Imaging Centre (BIC), Montreal Neurological Institute (MNI), Faculty of Medicine, McGill University, Montreal H3A2B4, Canada.
Social isolation impacts brain structure, specifically the hippocampus and default network. Lack of social support correlates with distinct patterns in these brain regions, varying by hemisphere and genetic predisposition.
Area of Science:
- Neuroscience
- Social Neuroscience
- Brain Imaging
Background:
- Human social interaction is crucial for well-being.
- Social isolation can negatively affect neural substrates of social cognition.
- Previous research focused separately on the default network (DN) and hippocampus (HC).
Purpose of the Study:
- To investigate the co-variation between default network (DN) subregions and hippocampus (HC) subfields during social isolation.
- To link structural brain patterns to social support and genetic predisposition.
Main Methods:
- Utilized structural brain scans from approximately 40,000 UK Biobank participants.
- Employed a two-pronged decomposition to analyze brain structure.
- Investigated co-expression patterns between DN and HC subregions.
Main Results:
- Lack of social support was associated with lateralized DN subregion patterns.
- These DN patterns co-varied with specific HC subfields (subiculum, presubiculum, CA2, CA3, dentate gyrus).
- HC-DN co-variation patterns showed hemispheric segregation and distinct genetic associations.
Conclusions:
- Structural brain patterns in the hippocampus and default network are linked to social isolation.
- Hemispheric lateralization plays a role in these brain-social isolation associations.
- Genetic predisposition influences the brain's response to lack of social support.
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