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Early visual responses predict conscious face perception within and between subjects during binocular rivalry.

Sandberg, K; Bahrami, B; Kanai, R; Barnes, GR; Overgaard, M; Rees, G; (2013) Early visual responses predict conscious face perception within and between subjects during binocular rivalry. J Cogn Neurosci , 25 (6) 969 - 985. 10.1162/jocn_a_00353. Green open access

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Abstract

Previous studies indicate that conscious face perception may be related to neural activity in a large time window around 170-800 msec after stimulus presentation, yet in the majority of these studies changes in conscious experience are confounded with changes in physical stimulation. Using multivariate classification on MEG data recorded when participants reported changes in conscious perception evoked by binocular rivalry between a face and a grating, we showed that only MEG signals in the 120-320 msec time range, peaking at the M170 around 180 msec and the P2m at around 260 msec, reliably predicted conscious experience. Conscious perception could not only be decoded significantly better than chance from the sensors that showed the largest average difference, as previous studies suggest, but also from patterns of activity across groups of occipital sensors that individually were unable to predict perception better than chance. In addition, source space analyses showed that sources in the early and late visual system predicted conscious perception more accurately than frontal and parietal sites, although conscious perception could also be decoded there. Finally, the patterns of neural activity associated with conscious face perception generalized from one participant to another around the times of maximum prediction accuracy. Our work thus demonstrates that the neural correlates of particular conscious contents (here, faces) are highly consistent in time and space within individuals and that these correlates are shared to some extent between individuals.

Type: Article
Title: Early visual responses predict conscious face perception within and between subjects during binocular rivalry.
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1162/jocn_a_00353
Publisher version: http://dx.doi.org/10.1162/jocn_a_00353
Language: English
Additional information: © 2013 Massachusetts Institute of Technology Published under a Creative Commons Attribution 3.0 Unported (CC-BY 3.0) license. PMCID: PMC4060063
Keywords: Adult, Brain, Consciousness, Face, Humans, Magnetoencephalography, Male, Neuropsychological Tests, Pattern Recognition, Visual, Social Perception, Time Factors, Vision, Binocular, Young Adult
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Institute of Cognitive Neuroscience
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Imaging Neuroscience
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1382919
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