Sökning: id:"swepub:oai:DiVA.org:umu-32023" >
Neural correlates o...
Neural correlates of variable working memory load across adult age and skill : dissociative patterns within the fronto-parietal network
-
- Nyberg, Lars, 1966- (författare)
- Umeå universitet,Fysiologi,Diagnostisk radiologi,Umeå centrum för funktionell hjärnavbildning (UFBI)
-
- Dahlin, Erika, 1981- (författare)
- Umeå universitet,Fysiologi,Diagnostisk radiologi,Umeå centrum för funktionell hjärnavbildning (UFBI)
-
- Stigsdotter Neely, Anna, 1961- (författare)
- Umeå universitet,Institutionen för psykologi
-
visa fler...
-
- Bäckman, Lars (författare)
- Karolinska Institutet
-
visa färre...
-
(creator_code:org_t)
- John Wiley & Sons Inc. 2009
- 2009
- Engelska.
-
Ingår i: Scandinavian Journal of Psychology. - : John Wiley & Sons Inc.. - 0036-5564 .- 1467-9450. ; 50:1, s. 41-46
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
http://kipublication...
-
visa färre...
Abstract
Ämnesord
Stäng
- We examined neural changes related to variations in working memory load by using an n-back task with three levels and functional magnetic resonance imaging. Younger adults were divided into high- and low-performing groups (Young-High; Young-Low) and compared with older adults. Relative to Young-High, capacity-constraints in working memory were apparent between load 1-2 for the elderly and between load 2-3 for Young-Low. Capacity-constraints in neural activity followed this pattern by showing a monotonically increasing response in parietal cortex and thalamus for Young-High, whereas activity leveled off at 1-back for the elderly and at 2-back for Young-Low. The response in dorsal frontal cortex followed a similar pattern with the addition that the magnitude of activation differed within capacity limitations (Old > Young at 1-back; Young-Low > Young-High at 2-back). These findings indicate that an important determinant of WM capacity is the ability to keep the frontal cortex adequately engaged in relation to current task demands.
Nyckelord
- fMRI
- working memory load
- capacity-constraints
- MEDICINE
- MEDICIN
- medicin
- Medicine
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas