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Intra- and interhemispheric connectivity between face-selective regions in the human brain.
Jodie Davies-Thompson1, Timothy J Andrews
1Department of Psychology and York Neuroimaging Centre, University of York, York, United Kingdom.
Journal of Neurophysiology
|September 14, 2012
Summary
This study used fMRI to map face-selective brain regions and their interactions. Findings show stronger connectivity between hemispheres than within a hemisphere for face processing.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Neuroimaging
Background:
- Numerous brain regions are known to respond to faces.
- The interaction patterns among these face-selective regions are not fully understood.
Purpose of the Study:
- To identify face-selective brain regions using functional MRI (fMRI).
- To investigate the functional connectivity and interaction patterns between these regions in a large cohort.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed.
- Face selectivity was assessed in 72 human subjects.
- Functional connectivity was analyzed between identified face-selective regions.
Main Results:
- Consistent face selectivity was found in core regions (FFA, OFA, STS) and extended regions (IPS, PCu, SC, AMG, IFG).
- Stronger functional connectivity was observed between homologous regions in different hemispheres compared to regions within the same hemisphere.
- Distinct connectivity patterns emerged: OFA/FFA correlated with IPS/PCu/SC, while STS correlated with AMG/IFG.
Conclusions:
- Interhemispheric and intrahemispheric connections are crucial for face perception.
- The study elucidates the network dynamics underlying face processing in the human brain.
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