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Seen gaze-direction modulates fusiform activity and its coupling with other brain areas during face processing
N George1, J Driver, R J Dolan
1Functional Imaging Laboratory, Wellcome Department of Cognitive Neurology, 12 Queen Square, London WC1N 3BG, England.
Neuroimage
|May 16, 2001
Summary
Direct gaze activates face processing regions like the fusiform gyrus and amygdala, enhancing social interaction signals. Averted gaze, however, shifts attention to the periphery via the intraparietal sulcus.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Social Neuroscience
Background:
- Gaze contact is a crucial precursor to social interaction.
- It signals the allocation of processing resources towards a specific face.
Purpose of the Study:
- To investigate the neural mechanisms underlying how gaze direction influences face processing.
- To differentiate the effects of gaze direction from head orientation on brain activity.
Main Methods:
- Functional magnetic resonance imaging (fMRI) study.
- Independent manipulation of gaze direction (direct vs. averted) and head orientation (direct vs. deviated).
Main Results:
- Direct gaze, irrespective of head orientation, enhanced activation in ventral occipitotemporal cortices, including the fusiform gyrus.
- Direct gaze increased functional connectivity between the fusiform gyrus and the amygdala.
- Averted gaze, irrespective of head orientation, increased functional connectivity between the fusiform gyrus and the intraparietal sulcus.
Conclusions:
- Gaze direction significantly modulates face processing networks in the brain.
- Direct gaze prioritizes face-related processing and emotional salience via amygdala coupling.
- Averted gaze directs attentional resources towards peripheral information via intraparietal sulcus coupling.