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The Deceptively Simple N170 Reflects Network Information Processing Mechanisms Involving Visual Feature Coding and
Robin A A Ince1, Katarzyna Jaworska1, Joachim Gross1
1Institute of Neuroscience and Psychology, University of Glasgow, Glasgow G12 8QB, UK.
Cerebral Cortex (New York, N.Y. : 1991)
|August 24, 2016
Summary
The earliest brain response to faces, the N170 Event-Related Potential (ERP), reflects dynamic information processing across hemispheres. This visual cognition research shows the N170 involves coding and transferring facial features, not just local stimulus response.
Area of Science:
- Neuroscience
- Cognitive Science
- Visual Processing
Background:
- Understanding visual cognition requires mapping brain responses to specific visual features.
- The N170 is an early Event-Related Potential (ERP) primarily associated with face processing.
Purpose of the Study:
- To investigate the N170's role in face detection and categorization.
- To determine if the N170 reflects a dynamic information processing network rather than a local event.
Main Methods:
- Utilized reverse-correlation methods.
- Employed information-theoretic analyses to study visual feature processing.
Main Results:
- Eye visibility significantly influences face detection behavior.
- The N170 initially codes the behaviorally relevant eye contralateral to the sensor.
- Subsequent cross-hemispheric communication transfers information about the other eye.
Conclusions:
- The N170 is not a simple stimulus-driven event but a complex network mechanism.
- This network dynamically codes and transfers face features across brain hemispheres.
- Findings reveal intricate information processing underlying visual face recognition.
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