Ince, R. A.A. , Jaworska, K. , Gross, J. , Panzeri, S., Van Rijsbergen, N. J. , Rousselet, G. A. and Schyns, P. G. (2016) The deceptively simple N170 reflects network information processing mechanisms involving visual feature coding and transfer across hemispheres. Cerebral Cortex, 26(11), pp. 4123-4135. (doi: 10.1093/cercor/bhw196) (PMID:27550865) (PMCID:PMC5066825)
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Abstract
A key to understanding visual cognition is to determine where, when and how brain responses reflect the processing of the specific visual features that modulate categorization behavior - the what. The N170 is the earliest Event-Related Potential (ERP) that preferentially responds to faces. Here, we demonstrate that a paradigmatic shift is necessary to interpret the N170 as the product of an information processing network that dynamically codes and transfers face features across hemispheres, rather than as a local stimulus-driven event. Reverse-correlation methods coupled with information-theoretic analyses revealed that visibility of the eyes influences face detection behavior. The N170 initially reflects coding of the behaviorally relevant eye contra-lateral to the sensor, followed by a causal communication of the other eye from the other hemisphere. These findings demonstrate that the deceptively simple N170 ERP hides a complex network information processing mechanism involving initial coding and subsequent cross-hemispheric transfer of visual features.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Jaworska, Dr Katarzyna and Rousselet, Dr Guillaume and Van Rijsbergen, Dr Nicola and Panzeri, Professor Stefano and Ince, Dr Robin and Gross, Professor Joachim and Schyns, Professor Philippe |
| Authors: | Ince, R. A.A., Jaworska, K., Gross, J., Panzeri, S., Van Rijsbergen, N. J., Rousselet, G. A., and Schyns, P. G. |
| College/School: | College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience |
| Journal Name: | Cerebral Cortex |
| Publisher: | Oxford University Press |
| ISSN: | 1047-3211 |
| ISSN (Online): | 1460-2199 |
| Published Online: | 22 August 2016 |
| Copyright Holders: | Copyright © 2016 The Authors |
| First Published: | First published in Cerebral Cortex 26(11):4123-4135 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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