The deceptively simple N170 reflects network information processing mechanisms involving visual feature coding and transfer across hemispheres

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:Van Rijsbergen, Dr Nicola and Panzeri, Professor Stefano and Rousselet, Dr Guillaume and Schyns, Professor Philippe and Ince, Dr Robin and Gross, Professor Joachim
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 > Institute of Neuroscience and Psychology
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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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
597051Natural and modulated neural communication: State-dependent decoding and driving of human Brain Oscillations.Joachim GrossWellcome Trust (WELLCOME)098433/Z/12/ZINP - CENTRE FOR COGNITIVE NEUROIMAGING
698281Brain Algorithmics: Reverse Engineering Dynamic Information Processing Networks from MEG time seriesPhilippe SchynsWellcome Trust (WELLCOME)107802/Z/15/ZINP - CENTRE FOR COGNITIVE NEUROIMAGING
591881Understanding age-related changes in processing facial emotionPhilippe SchynsBiotechnology and Biological Sciences Research Council (BBSRC)BB/J018929/1INP - CENTRE FOR COGNITIVE NEUROIMAGING
607901VISUALISEStefano PanzeriEuropean Commission (EC)600954RI NEUROSCIENCE & PSYCHOLOGY