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Updated: Apr 1, 2026
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Analyzing Neural Activity and Connectivity Using Intracranial EEG Data with SPM Software
Published on: October 30, 2018
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Gaze Direction Modulates the Relation between Neural Responses to Faces and Visual Awareness
Apoorva Rajiv Madipakkam1, Marcus Rothkirch2, Matthias Guggenmos3
1Department of Psychiatry, International Graduate Program Medical Neurosciences, and Berlin Center for Advanced Neuroimaging, Charité, Universitätsmedizin Berlin, 10117 Berlin, Germany, and apoorva-rajiv.madipakkam@charite.de.
Summary
Direct gaze gains privileged access to visual awareness. Lower neural activity in the fusiform face area (FFA) is sufficient for direct gaze to enter awareness compared to averted gaze.
Area of Science:
- Neuroscience
- Social Cognition
- Visual Perception
Background:
- Direct gaze is a potent nonverbal cue crucial for social interactions.
- Understanding the neural basis of how direct gaze gains preferential access to awareness is key.
Purpose of the Study:
- To investigate the neural mechanisms behind the privileged access of direct gaze to visual awareness.
- To determine how gaze direction modulates neural responses related to conscious perception.
Main Methods:
- Functional magnetic resonance imaging (fMRI) in healthy volunteers.
- Continuous flash suppression (CFS) to manipulate awareness of faces with direct or averted gaze.
- Analysis of neural responses in key brain regions, including the fusiform face area (FFA).
Main Results:
- Gaze processing network showed reduced responses when faces were not consciously perceived.
- Direct gaze elicited stronger responses than averted gaze when participants were aware.
- Direct gaze elicited weaker responses than averted gaze when participants were unaware.
- Increased neural activation in the FFA correlated with faster awareness of direct-gaze faces.
Conclusions:
- Neural activity in the FFA modulates the relationship between gaze direction and conscious awareness.
- Lower neural activation thresholds are sufficient for direct gaze to reach awareness compared to averted gaze.
- This provides a neural basis for the prioritized processing of direct gaze in social contexts.
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