Phase synchronization of delta and theta oscillations increase during the detection of relevant lexical information

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dc.contributor.authorBrunetti, Enzo
dc.contributor.authorMaldonado, Pedro E.
dc.contributor.authorAboitiz, Francisco
dc.date.accessioned2025-01-24T00:07:08Z
dc.date.available2025-01-24T00:07:08Z
dc.date.issued2013
dc.description.abstractDuring monitoring of the discourse, the detection of the relevance of incoming lexical information could be critical for its incorporation to update mental representations in memory. Because, in these situations, the relevance for lexical information is defined by abstract rules that are maintained in memory, a central aspect to elucidate is how an abstract level of knowledge maintained in mind mediates the detection of the lower-level semantic information. In the present study, we propose that neuronal oscillations participate in the detection of relevant lexical information, based on "kept in mind" rules deriving from more abstract semantic information. We tested our hypothesis using an experimental paradigm that restricted the detection of relevance to inferences based on explicit information, thus controlling for ambiguities derived from implicit aspects. We used a categorization task, in which the semantic relevance was previously defined based on the congruency between a kept in mind category (abstract knowledge), and the lexical semantic information presented. Our results show that during the detection of the relevant lexical information, phase synchronization of neuronal oscillations selectively increases in delta and theta frequency bands during the interval of semantic analysis. These increments occurred irrespective of the semantic category maintained in memory, had a temporal profile specific for each subject, and were mainly induced, as they had no effect on the evoked mean global field power. Also, recruitment of an increased number of pairs of electrodes was a robust observation during the detection of semantic contingent words. These results are consistent with the notion that the detection of relevant lexical information based on a particular semantic rule, could be mediated by increasing the global phase synchronization of neuronal oscillations, which may contribute to the recruitment of an extended number of cortical regions.
dc.description.funderHSRD VA
dc.fuente.origenWOS
dc.identifier.doi10.3389/fpsyg.2013.00308
dc.identifier.issn1664-1078
dc.identifier.urihttps://doi.org/10.3389/fpsyg.2013.00308
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101897
dc.identifier.wosidWOS:000331040200001
dc.language.isoen
dc.revistaFrontiers in psychology
dc.rightsacceso restringido
dc.subjectlanguage
dc.subjectsemantic analysis
dc.subjectrelevance
dc.subjectoscillations
dc.subjectphase synchronization
dc.subjecttheta
dc.subjectdelta
dc.subjectgamma
dc.titlePhase synchronization of delta and theta oscillations increase during the detection of relevant lexical information
dc.typeartículo
dc.volumen4
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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