Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/109785
DC Field | Value | Language |
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dc.contributor.author | Castelhano, João | - |
dc.contributor.author | Rebola, José | - |
dc.contributor.author | Leitão, Bruno | - |
dc.contributor.author | Rodriguez, Eugenio | - |
dc.contributor.author | Castelo-Branco, Miguel | - |
dc.date.accessioned | 2023-10-26T10:28:08Z | - |
dc.date.available | 2023-10-26T10:28:08Z | - |
dc.date.issued | 2013 | - |
dc.identifier.issn | 1932-6203 | pt |
dc.identifier.uri | https://hdl.handle.net/10316/109785 | - |
dc.description.abstract | The relation of gamma-band synchrony to holistic perception in which concerns the effects of sensory processing, high level perceptual gestalt formation, motor planning and response is still controversial. To provide a more direct link to emergent perceptual states we have used holistic EEG/ERP paradigms where the moment of perceptual "discovery" of a global pattern was variable. Using a rapid visual presentation of short-lived Mooney objects we found an increase of gamma-band activity locked to perceptual events. Additional experiments using dynamic Mooney stimuli showed that gamma activity increases well before the report of an emergent holistic percept. To confirm these findings in a data driven manner we have further used a support vector machine classification approach to distinguish between perceptual vs. non perceptual states, based on time-frequency features. Sensitivity, specificity and accuracy were all above 95%. Modulations in the 30-75 Hz range were larger for perception states. Interestingly, phase synchrony was larger for perception states for high frequency bands. By focusing on global gestalt mechanisms instead of local processing we conclude that gamma-band activity and synchrony provide a signature of holistic perceptual states of variable onset, which are separable from sensory and motor processing. | pt |
dc.language.iso | eng | pt |
dc.publisher | Public Library of Science | pt |
dc.relation | PTDC/PSI/67381/2006 | pt |
dc.relation | PEst-C/SAU/UI3282/2013 | pt |
dc.relation | CENTRO-07-ST24-FEDER-00205 | pt |
dc.relation | SFRH/BD/65341/2009 | pt |
dc.relation | PIC/IC/82986/2007 | pt |
dc.rights | openAccess | pt |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt |
dc.subject.mesh | Acoustic Stimulation | pt |
dc.subject.mesh | Adult | pt |
dc.subject.mesh | Female | pt |
dc.subject.mesh | Humans | pt |
dc.subject.mesh | Male | pt |
dc.subject.mesh | Perception | pt |
dc.subject.mesh | Photic Stimulation | pt |
dc.subject.mesh | Reaction Time | pt |
dc.subject.mesh | Young Adult | pt |
dc.subject.mesh | Electroencephalography | pt |
dc.subject.mesh | Event-Related Potentials, P300 | pt |
dc.title | To perceive or not perceive: the role of gamma-band activity in signaling object percepts | pt |
dc.type | article | - |
degois.publication.firstPage | e66363 | pt |
degois.publication.issue | 6 | pt |
degois.publication.title | PLoS ONE | pt |
dc.peerreviewed | yes | pt |
dc.identifier.doi | 10.1371/journal.pone.0066363 | pt |
degois.publication.volume | 8 | pt |
dc.date.embargo | 2013-01-01 | * |
uc.date.periodoEmbargo | 0 | pt |
item.fulltext | Com Texto completo | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.openairetype | article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
crisitem.project.grantno | Strategic Project - UI 3282 - 2013-2014 | - |
crisitem.project.grantno | Vision and action processing in neurodevelopmental disorders: from disease mechanisms to new interventional strategies | - |
crisitem.author.researchunit | CNC - Center for Neuroscience and Cell Biology | - |
crisitem.author.researchunit | CIBIT - Coimbra Institute for Biomedical Imaging and Translational Research | - |
crisitem.author.orcid | 0000-0002-8996-1515 | - |
crisitem.author.orcid | 0000-0002-6963-9414 | - |
crisitem.author.orcid | 0000-0003-4364-6373 | - |
Appears in Collections: | FMUC Medicina - Artigos em Revistas Internacionais I&D IBILI - Artigos em Revistas Internacionais I&D CISUC - Artigos em Revistas Internacionais |
Files in This Item:
File | Description | Size | Format | |
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To-Perceive-or-Not-Perceive-The-Role-of-Gammaband-Activity-in-Signaling-Object-PerceptsPLoS-ONE.pdf | 2.79 MB | Adobe PDF | View/Open |
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