Neurocognitive Profiles of Older Adults with Working-Memory Dysfunction

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Salami, AlirezaKarolinska Institutet,Stockholms universitet,Umeå universitet,Umeå centrum för funktionell hjärnavbildning (UFBI),Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden,Centrum för forskning om äldre och åldrande (ARC), (tills m KI),Umeå University, Sweden (author)

Neurocognitive Profiles of Older Adults with Working-Memory Dysfunction

Article/chapterEnglish2018

Publisher, publication year, extent ...

2018-04-18
Oxford University Press,2018
electronicrdacarrier

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LIBRIS-ID:oai:DiVA.org:umu-150747
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-150747URI
https://doi.org/10.1093/cercor/bhy062DOI
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-158355URI
http://kipublications.ki.se/Default.aspx?queryparsed=id:138658264URI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

Individuals differ in how they perceive, remember, and think. There is evidence for the existence of distinct subgroups that differ in cognitive performance within the older population. However, it is less clear how individual differences in cognition in old age are linked to differences in brain-based measures. We used latent-profile analysis on n-back working-memory (WM) performance to identify subgroups in a large sample of older adults (n = 181; age = 64-68 years). Our analysis identified one larger normal subgroup with higher performance (n = 113; 63%), and a second smaller subgroup (n = 55; 31%) with lower performance. The low-performing subgroup showed weaker load-dependent BOLD modulation and lower connectivity within the fronto-parietal network (FPN) as well as between FPN and striatum during n-back, along with lower FPN connectivity at rest. This group also exhibited lower FPN structural integrity, lower frontal dopamine D2 binding potential, inferior performance on offline WM tests, and a trend-level genetic predisposition for lower dopamine-system efficiency. By contrast, this group exhibited relatively intact episodic memory and associated brain measures (i.e., hippocampal volume, structural, and functional connectivity within the default-mode network). Collectively, these data provide converging evidence for the existence of a group of older adults with impaired WM functioning characterized by reduced cortico-striatal coupling and aberrant cortico-cortical integrity within FPN.

Subject headings and genre

MEDICIN OCH HÄLSOVETENSKAP Medicinska och farmaceutiska grundvetenskaper Neurovetenskaper hsv//swe
MEDICAL AND HEALTH SCIENCES Basic Medicine Neurosciences hsv//eng
dopamine
fronto-parietal network
functional connectivity
individual differences
working memory

Added entries (persons, corporate bodies, meetings, titles ...)

Rieckmann, AnnaUmeå universitet,Diagnostisk radiologi,Umeå centrum för funktionell hjärnavbildning (UFBI)(Swepub:umu)anri0051 (author)
Karalija, Nina,1984-Umeå universitet,Umeå centrum för funktionell hjärnavbildning (UFBI),Diagnostisk radiologi(Swepub:umu)nine0001 (author)
Avelar-Pereira, BárbaraKarolinska Institutet,Stockholms universitet,Umeå universitet,Umeå centrum för funktionell hjärnavbildning (UFBI),Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden,Centrum för forskning om äldre och åldrande (ARC), (tills m KI),Umeå University, Sweden (author)
Andersson, MicaelUmeå universitet,Diagnostisk radiologi,Institutionen för integrativ medicinsk biologi (IMB)(Swepub:umu)mian0001 (author)
Wåhlin, AndersUmeå universitet,Radiofysik,Umeå centrum för funktionell hjärnavbildning (UFBI)(Swepub:umu)arswan02 (author)
Papenberg, GoranKarolinska Institutet,Stockholms universitet,Centrum för forskning om äldre och åldrande (ARC), (tills m KI) (author)
Garrett, Douglas D. (author)
Riklund, KatrineUmeå universitet,Diagnostisk radiologi,Umeå centrum för funktionell hjärnavbildning (UFBI)(Swepub:umu)kaah0001 (author)
Lövdén, MartinStockholms universitet,Centrum för forskning om äldre och åldrande (ARC), (tills m KI) (author)
Lindenberger, Ulman (author)
Bäckman, LarsKarolinska Institutet,Stockholms universitet,Centrum för forskning om äldre och åldrande (ARC), (tills m KI) (author)
Nyberg, Lars,1966-Umeå universitet,Diagnostisk radiologi,Umeå centrum för funktionell hjärnavbildning (UFBI),Institutionen för integrativ medicinsk biologi (IMB)(Swepub:umu)lany0001 (author)
Umeå universitetUmeå centrum för funktionell hjärnavbildning (UFBI) (creator_code:org_t)

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In:Cerebral Cortex: Oxford University Press28:7, s. 2525-25391047-32111460-2199

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By the author/editor: Salami, Alireza; Rieckmann, Anna; Karalija, Nina, ...; Avelar-Pereira, ...; Andersson, Micae ...; Wåhlin, Anders; show more...; Papenberg, Goran; Garrett, Douglas ...; Riklund, Katrine; Lövdén, Martin; Lindenberger, Ul ...; Bäckman, Lars; Nyberg, Lars, 19 ...; show less...

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Basic Medicine; and Neurosciences

Articles in the publication: Cerebral Cortex

By the university: Umeå University; Stockholm University; Karolinska Institutet

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