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dc.contributor.authorPinal Fernández, Diego
dc.contributor.authorZurrón Ocio, Montserrat
dc.contributor.authorDíaz Fernández, Fernando
dc.date.accessioned2020-04-14T15:18:20Z
dc.date.available2020-04-14T15:18:20Z
dc.date.issued2015
dc.identifier.citationPinal D, Zurrón M and Díaz F (2015) Age-related changes in brain activity are specific for high order cognitive processes during successful encoding of information in working memory. Front. Aging Neurosci. 7:75
dc.identifier.urihttp://hdl.handle.net/10347/21378
dc.description.abstractMemory capacity suffers an age-related decline, which is supposed to be due to a generalized slowing of processing speed and to a reduced availability of processing resources. Information encoding in memory has been demonstrated to be very sensitive to age-related changes, especially when carried out through self-initiated strategies or under high cognitive demands. However, most event-related potentials (ERP) research on age-related changes in working memory (WM) has used tasks that preclude distinction between age-related changes in encoding and retrieval processes. Here, we used ERP recording and a delayed match to sample (DMS) task with two levels of memory load to assess age-related changes in electrical brain activity in young and old adults during successful information encoding in WM. Age-related decline was reflected in lower accuracy rates and longer reaction times in the DMS task. Beside, only old adults presented lower accuracy rates under high than low memory load conditions. However, effects of memory load on brain activity were independent of age and may indicate an increased need of processing after stimulus classification as reflected in larger mean voltages in high than low load conditions between 550 and 1000 ms post-stimulus for young and old adults. Regarding age-related effects on brain activity, results also revealed smaller P2 and P300 amplitudes that may signal the existence of an age dependent reduction in the processing resources available for stimulus evaluation and categorization. Additionally, P2 and N2 latencies were longer in old than in young participants. Furthermore, longer N2 latencies were related to greater accuracy rates on the DMS task, especially in old adults. These results suggest that age-related slowing of processing speed may be specific for target stimulus analysis and evaluation processes. Thus, old adults seem to improve their performance the longer they take to evaluate the stimulus they encode in visual WM
dc.description.sponsorshipThis study was funded by the Spanish Government through the Ministerios de Educación (BES 2008-005929) and Economía y Competitividad (PSI2010-22224-C03-03) and by the Galician Government through the Consellería de Economía e Industria (10 PXIB 211070 PR), and Consellería de Educación e Ordenación Universitaria (Axudas para a Consolidación e Estruturación de unidades de investigación competitivas do sistema universitario de Galicia. Ref: CN 2012/033)
dc.language.isoeng
dc.publisherFrontiers Media
dc.rightsCopyright © 2015 Pinal, Zurrón and Díaz. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectEvent-related potentials
dc.subjectWorking memory
dc.subjectEncoding
dc.subjectAging
dc.subjectExecutive functions
dc.subjectSlowing of processing
dc.titleAge-related changes in brain activity are specific for high order cognitive processes during successful encoding of information in working memory
dc.typejournal article
dc.identifier.doi10.3389/fnagi.2015.00075
dc.relation.publisherversionhttps://doi.org/10.3389/fnagi.2015.00075
dc.type.hasVersionVoR
dc.identifier.essn1663-4365
dc.rights.accessRightsopen access
dc.contributor.affiliationUniversidade de Santiago de Compostela. Departamento de Psicoloxía Clínica e Psicobioloxía
dc.description.peerreviewedSI
dc.relation.projectIDinfo:eu-repo/grantAgreement/MICINN/Plan Nacional de I+D+i 2008-2011/PSI2010-22224-C03-03/ES/ESTUDIO LONGITUDINAL SOBRE MARCADORES PSICOFISIOLOGICOS EN EL ENVEJECIMIENTO NORMAL, DETERIORO COGNITIVO LIGERO Y ENFERMEDAD DE ALZHEIMER


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Copyright © 2015 Pinal, Zurrón and Díaz. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms
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 Copyright © 2015 Pinal, Zurrón and Díaz. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms





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