Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o
Main Author: | |
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Publication Date: | 2011 |
Format: | Master thesis |
Language: | por |
Source: | Biblioteca Digital de Teses e Dissertações da PUC_RS |
Download full: | http://tede2.pucrs.br/tede2/handle/tede/5429 |
Summary: | Background: Age related reductions in contextual memory can impair daily functioning of older adults and have an important impact on their quality of life. Thus, the understanding of the neurobiological correlates of this memory decline is important to the establishment of effective cognitive interventions in healthy older adults. Objective: The current study was aimed to investigate the effects of aging and prefrontal cortex (PFC) function on contextual memory performance under different encoding conditions in a naturalistic experimental paradigm. Methods: Young (n=34, aged 20 - 35 years) and older adult men (n=31; aged 54 - 87 years) matched for education completed a recognition memory task for context (location of objects depicted in different rooms of a house) with or without an incidental binding cue at encoding. In addition, Wisconsin Card Sorting Test (WCST) was carried out to assess PFC function. Results: Results for contextual memory performance showed significant main effects of aging and encoding condition. Older adults performed significantly poorer than young controls in the encoding condition without incidental binding cue. The introduction of the incidental binding cue at encoding significantly improved the context recognition scores in young and older adults. A significant association between WCST scores and the performance for contextual memory were found only in the task without binding cue and just for the older adult men. Conclusion: The main findings indicate that the age related deficits on contextual memory are associated to age related impairments of PFC function, as indicated by the WCST. However, contextual memory of older adults improved with cognitive support at encoding and became independent of the scores on WCST, suggesting that incidental associative binding instructions at encoding can mitigate PFC deficits. |
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Bromberg, ElkeCPF:56961499015http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785654J5CPF:00810505002http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4223303E2Barragana, V?nia Jofr?2015-04-14T14:51:16Z2012-04-132011-11-11BARRAGANA, V?nia Jofr?. Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o. 2011. 53 f. Disserta??o (Mestrado em Biologia Celular e Molecular) - Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Porto Alegre, 2011.http://tede2.pucrs.br/tede2/handle/tede/5429Background: Age related reductions in contextual memory can impair daily functioning of older adults and have an important impact on their quality of life. Thus, the understanding of the neurobiological correlates of this memory decline is important to the establishment of effective cognitive interventions in healthy older adults. Objective: The current study was aimed to investigate the effects of aging and prefrontal cortex (PFC) function on contextual memory performance under different encoding conditions in a naturalistic experimental paradigm. Methods: Young (n=34, aged 20 - 35 years) and older adult men (n=31; aged 54 - 87 years) matched for education completed a recognition memory task for context (location of objects depicted in different rooms of a house) with or without an incidental binding cue at encoding. In addition, Wisconsin Card Sorting Test (WCST) was carried out to assess PFC function. Results: Results for contextual memory performance showed significant main effects of aging and encoding condition. Older adults performed significantly poorer than young controls in the encoding condition without incidental binding cue. The introduction of the incidental binding cue at encoding significantly improved the context recognition scores in young and older adults. A significant association between WCST scores and the performance for contextual memory were found only in the task without binding cue and just for the older adult men. Conclusion: The main findings indicate that the age related deficits on contextual memory are associated to age related impairments of PFC function, as indicated by the WCST. However, contextual memory of older adults improved with cognitive support at encoding and became independent of the scores on WCST, suggesting that incidental associative binding instructions at encoding can mitigate PFC deficits.Introdu??o: Redu??es na mem?ria contextual relacionadas ? idade podem prejudicar o funcionamento di?rio dos idosos e t?m um impacto importante na sua qualidade de vida. Assim, a compreens?o dos correlatos neurobiol?gicos deste decl?nio da mem?ria ? importante para o estabelecimento de interven??es cognitivas eficazes em idosos saud?veis. Objetivo: O presente estudo teve como objetivo investigar os efeitos do envelhecimento e da fun??o do c?rtex pr?-frontal (CPF) sobre o desempenho da mem?ria contextual em condi??es diferentes de codifica??o em um paradigma experimental naturalista. M?todos: Jovens (n = 34; 26,02 ? 0,64) e idosos (n = 31; 69,09 ? 1,26) do sexo masculino pareados por n?vel educacional. Os volunt?rios foram submetidos a uma tarefa de mem?ria de reconhecimento de contexto (localiza??o de objetos representados em diferentes salas de uma casa) com ou sem uma estrat?gia de codifica??o associativa. Al?m disso, o Teste Wisconsin de Classifica??o de Cartas (WCST) foi realizado para avaliar a integridade funcional do CPF. Resultados: Os resultados para o desempenho da mem?ria contextual mostrou efeitos significativos do envelhecimento e da estrat?gia de codifica??o. Os idosos tiveram um desempenho significativamente pior do que controles jovens na condi??o de codifica??o sem estrat?gia de codifica??o. A introdu??o da estrat?gia de codifica??o melhorou significativamente as pontua??es do reconhecimento do contexto nos jovens e idosos. A associa??o significativa entre as pontua??es WCST e o desempenho da mem?ria contextual foram encontrados apenas nos idosos sem estrat?gia de codifica??o. Conclus?o: As principais conclus?es indicam que os d?ficits na mem?ria contextual e dist?rbios da fun??o do CPF est?o relacionados com a idade, como indicado pelo WCST. No entanto, a mem?ria contextual dos idosos melhorou, com o a introdu??o da estrat?gia de codifica??o associativa e tornou-se independente da pontua??o no WCST, sugerindo a estrat?gia de codifica??o associativa pode atenuar os d?ficits do CPF.Made available in DSpace on 2015-04-14T14:51:16Z (GMT). No. of bitstreams: 1 437812.pdf: 154195 bytes, checksum: 6d937534253a5ebf131f023920cdd572 (MD5) Previous issue date: 2011-11-11application/pdfhttp://tede2.pucrs.br:80/tede2/retrieve/16444/437812.pdf.jpgporPontif?cia Universidade Cat?lica do Rio Grande do SulPrograma de P?s-Gradua??o em Biologia Celular e MolecularPUCRSBRFaculdade de Bioci?nciasBIOLOGIA CELULARC?RTEX PR?-FRONTALENVELHECIMENTOMEM?RIAIDOSOSCNPQ::CIENCIAS BIOLOGICAS::BIOLOGIA GERALEfeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??oinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis819824693009663736060060036528317262667714info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da PUC_RSinstname:Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)instacron:PUC_RSTHUMBNAIL437812.pdf.jpg437812.pdf.jpgimage/jpeg3636http://tede2.pucrs.br/tede2/bitstream/tede/5429/3/437812.pdf.jpg2f163fa791f38701601ac1c0225c8323MD53TEXT437812.pdf.txt437812.pdf.txttext/plain89938http://tede2.pucrs.br/tede2/bitstream/tede/5429/2/437812.pdf.txt73a4769c5c112b012dfec4340a989f86MD52ORIGINAL437812.pdfapplication/pdf154195http://tede2.pucrs.br/tede2/bitstream/tede/5429/1/437812.pdf6d937534253a5ebf131f023920cdd572MD51tede/54292015-05-14 11:40:31.845oai:tede2.pucrs.br:tede/5429Biblioteca Digital de Teses e Dissertaçõeshttp://tede2.pucrs.br/tede2/PRIhttps://tede2.pucrs.br/oai/requestbiblioteca.central@pucrs.br||opendoar:2015-05-14T14:40:31Biblioteca Digital de Teses e Dissertações da PUC_RS - Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)false |
dc.title.por.fl_str_mv |
Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o |
title |
Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o |
spellingShingle |
Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o Barragana, V?nia Jofr? BIOLOGIA CELULAR C?RTEX PR?-FRONTAL ENVELHECIMENTO MEM?RIA IDOSOS CNPQ::CIENCIAS BIOLOGICAS::BIOLOGIA GERAL |
title_short |
Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o |
title_full |
Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o |
title_fullStr |
Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o |
title_full_unstemmed |
Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o |
title_sort |
Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o |
author |
Barragana, V?nia Jofr? |
author_facet |
Barragana, V?nia Jofr? |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Bromberg, Elke |
dc.contributor.advisor1ID.fl_str_mv |
CPF:56961499015 |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785654J5 |
dc.contributor.authorID.fl_str_mv |
CPF:00810505002 |
dc.contributor.authorLattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4223303E2 |
dc.contributor.author.fl_str_mv |
Barragana, V?nia Jofr? |
contributor_str_mv |
Bromberg, Elke |
dc.subject.por.fl_str_mv |
BIOLOGIA CELULAR C?RTEX PR?-FRONTAL ENVELHECIMENTO MEM?RIA IDOSOS |
topic |
BIOLOGIA CELULAR C?RTEX PR?-FRONTAL ENVELHECIMENTO MEM?RIA IDOSOS CNPQ::CIENCIAS BIOLOGICAS::BIOLOGIA GERAL |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS BIOLOGICAS::BIOLOGIA GERAL |
description |
Background: Age related reductions in contextual memory can impair daily functioning of older adults and have an important impact on their quality of life. Thus, the understanding of the neurobiological correlates of this memory decline is important to the establishment of effective cognitive interventions in healthy older adults. Objective: The current study was aimed to investigate the effects of aging and prefrontal cortex (PFC) function on contextual memory performance under different encoding conditions in a naturalistic experimental paradigm. Methods: Young (n=34, aged 20 - 35 years) and older adult men (n=31; aged 54 - 87 years) matched for education completed a recognition memory task for context (location of objects depicted in different rooms of a house) with or without an incidental binding cue at encoding. In addition, Wisconsin Card Sorting Test (WCST) was carried out to assess PFC function. Results: Results for contextual memory performance showed significant main effects of aging and encoding condition. Older adults performed significantly poorer than young controls in the encoding condition without incidental binding cue. The introduction of the incidental binding cue at encoding significantly improved the context recognition scores in young and older adults. A significant association between WCST scores and the performance for contextual memory were found only in the task without binding cue and just for the older adult men. Conclusion: The main findings indicate that the age related deficits on contextual memory are associated to age related impairments of PFC function, as indicated by the WCST. However, contextual memory of older adults improved with cognitive support at encoding and became independent of the scores on WCST, suggesting that incidental associative binding instructions at encoding can mitigate PFC deficits. |
publishDate |
2011 |
dc.date.issued.fl_str_mv |
2011-11-11 |
dc.date.available.fl_str_mv |
2012-04-13 |
dc.date.accessioned.fl_str_mv |
2015-04-14T14:51:16Z |
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info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
BARRAGANA, V?nia Jofr?. Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o. 2011. 53 f. Disserta??o (Mestrado em Biologia Celular e Molecular) - Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Porto Alegre, 2011. |
dc.identifier.uri.fl_str_mv |
http://tede2.pucrs.br/tede2/handle/tede/5429 |
identifier_str_mv |
BARRAGANA, V?nia Jofr?. Efeitos do envelhecimento e da integridade funcional do c?rtex pr?-frontal sobre a mem?ria contextual e uso de estrat?gias de codifica??o. 2011. 53 f. Disserta??o (Mestrado em Biologia Celular e Molecular) - Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Porto Alegre, 2011. |
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http://tede2.pucrs.br/tede2/handle/tede/5429 |
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Pontif?cia Universidade Cat?lica do Rio Grande do Sul |
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Pontif?cia Universidade Cat?lica do Rio Grande do Sul |
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