TY  - JOUR
AU  - Kukolja, Juraj
AU  - Göreci, D. Yasemin
AU  - Onur, Özgür A.
AU  - Riedl, Valentin
AU  - Fink, Gereon R.
TI  - Resting-state fMRI evidence for early episodic memory consolidation: effects of age
JO  - Neurobiology of aging
VL  - 45
SN  - 0197-4580
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2016-04157
SP  - 197 - 211
PY  - 2016
AB  - Aging-related episodic memory decline is often attributed to insufficient encoding of new information, although the underlying neural processes remain elusive. We here tested the hypothesis that impaired memory consolidation contributes to aging-related memory decline. To this end, we used resting state functional magnetic resonance imaging in healthy young and older adults and investigated neural network connectivity underlying episodic memory consolidation and the effects of aging thereon. During postencoding rest, connectivity increased in subregions of temporobasal and temporo-occipital networks but decreased in a precuneal network. These connectivity changes predicted subsequent memory performance thereby constituting functional correlates of early memory consolidation. Furthermore, these consolidation-related regional connectivity changes partially overlapped with encoding-related neural activity changes, suggesting a close relationship between encoding- and consolidation-related activity. Older when compared to young participants failed to increase connectivity in the right lingual gyrus as part of an extended default mode network during consolidation, thereby providing a functional correlate for spatial contextual memory deficits. In conclusion, results are consistent with previous reports of persistent activity in regions mediating memory encoding as a core mechanism underlying episodic memory consolidation. Our data extend previous findings suggesting that aging-related memory decline results from a reduction of consolidation processes.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000381092900021
C6  - pmid:27459940
DO  - DOI:10.1016/j.neurobiolaging.2016.06.004
UR  - https://juser.fz-juelich.de/record/811806
ER  -