Neural Correlates of Working Memory Maintenance in Advanced Aging: Evidence From fMRI
Working memory (WM)-related brain activity is known to be modulated by aging; particularly, older adults demonstrate greater activity than young adults. However, it is still unclear whether the activity increase in older adults is also observed in advanced aging. The present functional magnetic reso...
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doaj-1344b64cfdc34d07874aa70807fb3e5f2020-11-24T23:38:03ZengFrontiers Media S.A.Frontiers in Aging Neuroscience1663-43652018-11-011010.3389/fnagi.2018.00358300528Neural Correlates of Working Memory Maintenance in Advanced Aging: Evidence From fMRIMaki Suzuki0Maki Suzuki1Toshikazu Kawagoe2Shu Nishiguchi3Nobuhito Abe4Yuki Otsuka5Ryusuke Nakai6Kohei Asano7Minoru Yamada8Sakiko Yoshikawa9Kaoru Sekiyama10Kaoru Sekiyama11Division of Cognitive Psychology, Faculty of Letters, Kumamoto University, Kumamoto, JapanDepartment of Behavioral Neurology and Neuropsychiatry, United Graduate School of Child Development, Osaka University, Suita, JapanDivision of Human and Social Sciences, Graduate School of Social and Cultural Sciences, Kumamoto University, Kumamoto, JapanDepartment of Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, JapanKokoro Research Center, Kyoto University, Kyoto, JapanKokoro Research Center, Kyoto University, Kyoto, JapanKokoro Research Center, Kyoto University, Kyoto, JapanKokoro Research Center, Kyoto University, Kyoto, JapanDepartment of Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, JapanKokoro Research Center, Kyoto University, Kyoto, JapanDivision of Cognitive Psychology, Faculty of Letters, Kumamoto University, Kumamoto, JapanGraduate School of Advanced Integrated Studies in Human Survivability, Kyoto University, Kyoto, JapanWorking memory (WM)-related brain activity is known to be modulated by aging; particularly, older adults demonstrate greater activity than young adults. However, it is still unclear whether the activity increase in older adults is also observed in advanced aging. The present functional magnetic resonance imaging (fMRI) study was designed to clarify the neural correlates of WM in advanced aging. Further, we set out to investigate in the case that adults of advanced age do show age-related increase in WM-related activity, what the functional significance of this over-recruitment might be. Two groups of older adults – “young–old” (61–70 years, n = 17) and “old–old” (77–82 years, n = 16) – were scanned while performing a visual WM task (the n-back task: 0-back and 1-back). WM effects (1-back > 0-back) common to both age groups were identified in several regions, including the bilateral dorsolateral prefrontal cortex (DLPFC), the inferior parietal cortex, and the insula. Greater WM effects in the old–old than in the young–old group were identified in the right caudal DLPFC. These results were replicated when we performed a separate analysis between two age groups with the same level of WM performance (the young–old vs. a “high-performing” subset of the old–old group). There were no regions where WM effects were greater in the young–old group than in the old–old group. Importantly, the magnitude of the over-recruitment WM effects positively correlated with WM performance in the old–old group, but not in the young–old group. The present findings suggest that cortical over-recruitment occurs in advanced old age, and that increased activity may serve a compensatory function in mediating WM performance.https://www.frontiersin.org/article/10.3389/fnagi.2018.00358/fullagingfMRIover-recruitmentcompensationworking memorymaintenance |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Maki Suzuki Maki Suzuki Toshikazu Kawagoe Shu Nishiguchi Nobuhito Abe Yuki Otsuka Ryusuke Nakai Kohei Asano Minoru Yamada Sakiko Yoshikawa Kaoru Sekiyama Kaoru Sekiyama |
spellingShingle |
Maki Suzuki Maki Suzuki Toshikazu Kawagoe Shu Nishiguchi Nobuhito Abe Yuki Otsuka Ryusuke Nakai Kohei Asano Minoru Yamada Sakiko Yoshikawa Kaoru Sekiyama Kaoru Sekiyama Neural Correlates of Working Memory Maintenance in Advanced Aging: Evidence From fMRI Frontiers in Aging Neuroscience aging fMRI over-recruitment compensation working memory maintenance |
author_facet |
Maki Suzuki Maki Suzuki Toshikazu Kawagoe Shu Nishiguchi Nobuhito Abe Yuki Otsuka Ryusuke Nakai Kohei Asano Minoru Yamada Sakiko Yoshikawa Kaoru Sekiyama Kaoru Sekiyama |
author_sort |
Maki Suzuki |
title |
Neural Correlates of Working Memory Maintenance in Advanced Aging: Evidence From fMRI |
title_short |
Neural Correlates of Working Memory Maintenance in Advanced Aging: Evidence From fMRI |
title_full |
Neural Correlates of Working Memory Maintenance in Advanced Aging: Evidence From fMRI |
title_fullStr |
Neural Correlates of Working Memory Maintenance in Advanced Aging: Evidence From fMRI |
title_full_unstemmed |
Neural Correlates of Working Memory Maintenance in Advanced Aging: Evidence From fMRI |
title_sort |
neural correlates of working memory maintenance in advanced aging: evidence from fmri |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Aging Neuroscience |
issn |
1663-4365 |
publishDate |
2018-11-01 |
description |
Working memory (WM)-related brain activity is known to be modulated by aging; particularly, older adults demonstrate greater activity than young adults. However, it is still unclear whether the activity increase in older adults is also observed in advanced aging. The present functional magnetic resonance imaging (fMRI) study was designed to clarify the neural correlates of WM in advanced aging. Further, we set out to investigate in the case that adults of advanced age do show age-related increase in WM-related activity, what the functional significance of this over-recruitment might be. Two groups of older adults – “young–old” (61–70 years, n = 17) and “old–old” (77–82 years, n = 16) – were scanned while performing a visual WM task (the n-back task: 0-back and 1-back). WM effects (1-back > 0-back) common to both age groups were identified in several regions, including the bilateral dorsolateral prefrontal cortex (DLPFC), the inferior parietal cortex, and the insula. Greater WM effects in the old–old than in the young–old group were identified in the right caudal DLPFC. These results were replicated when we performed a separate analysis between two age groups with the same level of WM performance (the young–old vs. a “high-performing” subset of the old–old group). There were no regions where WM effects were greater in the young–old group than in the old–old group. Importantly, the magnitude of the over-recruitment WM effects positively correlated with WM performance in the old–old group, but not in the young–old group. The present findings suggest that cortical over-recruitment occurs in advanced old age, and that increased activity may serve a compensatory function in mediating WM performance. |
topic |
aging fMRI over-recruitment compensation working memory maintenance |
url |
https://www.frontiersin.org/article/10.3389/fnagi.2018.00358/full |
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