dc.contributor.author | Meeren, Hanneke K. M. | |
dc.contributor.author | Hadjikhani, Nouchine | |
dc.contributor.author | Ahlfors, Seppo P. | |
dc.contributor.author | Hämäläinen, Matti S. | |
dc.contributor.author | de Gelder, Beatrice M.L. | |
dc.date.accessioned | 2013-01-17T21:34:14Z | |
dc.date.issued | 2008 | |
dc.identifier.citation | Meeren, Hanneke K. M., Nouchine Hadjikhani, Seppo P. Ahlfors, Matti S. Hämäläinen, and Beatrice de Gelder. 2008. Early category-specific cortical activation revealed by visual stimulus inversion. PLoS ONE 3(10): e3503. | en_US |
dc.identifier.issn | 1932-6203 | en_US |
dc.identifier.uri | http://nrs.harvard.edu/urn-3:HUL.InstRepos:10196736 | |
dc.description.abstract | Visual categorization may already start within the first 100-ms after stimulus onset, in contrast with the long-held view that during this early stage all complex stimuli are processed equally and that category-specific cortical activation occurs only at later stages. The neural basis of this proposed early stage of high-level analysis is however poorly understood. To address this question we used magnetoencephalography and anatomically-constrained distributed source modeling to monitor brain activity with millisecond-resolution while subjects performed an orientation task on the upright and upside-down presented images of three different stimulus categories: faces, houses and bodies. Significant inversion effects were found for all three stimulus categories between 70–100-ms after picture onset with a highly category-specific cortical distribution. Differential responses between upright and inverted faces were found in well-established face-selective areas of the inferior occipital cortex and right fusiform gyrus. In addition, early category-specific inversion effects were found well beyond visual areas. Our results provide the first direct evidence that category-specific processing in high-level category-sensitive cortical areas already takes place within the first 100-ms of visual processing, significantly earlier than previously thought, and suggests the existence of fast category-specific neocortical routes in the human brain. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | Public Library of Science | en_US |
dc.relation.isversionof | doi://10.1371/journal.pone.0003503 | en_US |
dc.relation.hasversion | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2566817/pdf/ | en_US |
dash.license | LAA | |
dc.subject | neuroscience | en_US |
dc.subject | cognitive neuroscience | en_US |
dc.subject | sensory systems | en_US |
dc.subject | experimental psychology | en_US |
dc.subject | natural and synthetic vision | en_US |
dc.title | Early Category-Specific Cortical Activation Revealed by Visual Stimulus Inversion | en_US |
dc.type | Journal Article | en_US |
dc.description.version | Version of Record | en_US |
dc.relation.journal | PLoS ONE | en_US |
dash.depositing.author | Hadjikhani, Nouchine | |
dc.date.available | 2013-01-17T21:34:14Z | |
dash.affiliation.other | HMS^Radiology-Massachusetts General Hospital | en_US |
dash.affiliation.other | HMS^Health Sciences and Technology | en_US |
dash.affiliation.other | HMS^Radiology-Massachusetts General Hospital | en_US |
dash.affiliation.other | HMS^Health Sciences and Technology | en_US |
dash.affiliation.other | HMS^Radiology-Massachusetts General Hospital | en_US |
dc.identifier.doi | 10.1371/journal.pone.0003503 | * |
dash.contributor.affiliated | de Gelder, Beatrice M.L. | |
dash.contributor.affiliated | Ahlfors, Seppo | |
dash.contributor.affiliated | Hadjikhani, Nouchine | |