Neural Mechanisms of Human Perceptual Learning: Electrophysiological Evidence for a Two-Stage Process

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dc.article.numbere19221
dc.catalogadorvzp
dc.contributor.authorHamamé, Carlos M.
dc.contributor.authorCosmelli Sánchez, Diego José
dc.contributor.authorHenriquez, Rodrigo
dc.contributor.authorAboitiz Domínguez, Francisco Javier
dc.date.accessioned2025-01-06T17:50:58Z
dc.date.available2025-01-06T17:50:58Z
dc.date.issued2011
dc.description.abstractBackground: Humans and other animals change the way they perceive the world due to experience. This process has been labeled as perceptual learning, and implies that adult nervous systems can adaptively modify the way in which they process sensory stimulation. However, the mechanisms by which the brain modifies this capacity have not been sufficiently analyzed.", "Methodology/Principal Findings: We studied the neural mechanisms of human perceptual learning by combining electroencephalographic (EEG) recordings of brain activity and the assessment of psychophysical performance during training in a visual search task. All participants improved their perceptual performance as reflected by an increase in sensitivity (d') and a decrease in reaction time. The EEG signal was acquired throughout the entire experiment revealing amplitude increments, specific and unspecific to the trained stimulus, in event-related potential (ERP) components N2pc and P3 respectively. P3 unspecific modification can be related to context or task-based learning, while N2pc may be reflecting a more specific attentional-related boosting of target detection. Moreover, bell and U-shaped profiles of oscillatory brain activity in gamma (30-60 Hz) and alpha (8-14 Hz) frequency bands may suggest the existence of two phases for learning acquisition, which can be understood as distinctive optimization mechanisms in stimulus processing.", "Conclusions/Significance: We conclude that there are reorganizations in several neural processes that contribute differently to perceptual learning in a visual search task. We propose an integrative model of neural activity reorganization, whereby perceptual learning takes place as a two-stage phenomenon including perceptual, attentional and contextual processes.
dc.format.extent13 páginas
dc.fuente.origenConveris
dc.identifier.doi10.1371/journal.pone.0019221
dc.identifier.eissn1932-6203
dc.identifier.issn1932-6203
dc.identifier.pubmedid21541280
dc.identifier.urihttps://doi.org/10.1371/journal.pone.0019221
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/89532
dc.identifier.wosidWOS:000290018400035
dc.information.autorucEscuela de Psicología; Cosmelli Sánchez, Diego José; 0000-0002-0012-4543; 1006520
dc.information.autorucEscuela de Medicina; Aboitiz Domínguez, Francisco Javier; 0000-0003-3253-8123; 100165
dc.issue.numero4
dc.language.isoen
dc.nota.accesocontenido completo
dc.pagina.final13
dc.pagina.inicio1
dc.revistaPLOS ONE
dc.rightsacceso abierto
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleNeural Mechanisms of Human Perceptual Learning: Electrophysiological Evidence for a Two-Stage Process
dc.typeartículo
dc.volumen6
sipa.codpersvinculados1006520
sipa.codpersvinculados100165
sipa.trazabilidadConveris;20-07-2021
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