Universität zu Köln

Fassbender, Ronja V., Risius, Okka J., Dronse, Julian, Richter, Nils, Gramespacher, Hannes ORCID: 0000-0002-9980-4978, Befahr, Qumars, Fink, Gereon R. ORCID: 0000-0002-8230-1856, Kukolja, Juraj ORCID: 0000-0003-1569-3287 and Onur, Oezguer A. (2022). Decreased Efficiency of Between-Network Dynamics During Early Memory Consolidation With Aging. Front. Aging Neurosci., 14. LAUSANNE: FRONTIERS MEDIA SA. ISSN 1663-4365

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Abstract

Aging is associated with memory decline and progressive disabilities in the activities of daily living. These deficits have a significant impact on the quality of life of the aging population and lead to a tremendous burden on societies and health care systems. Understanding the mechanisms underlying aging-related memory decline is likely to inform the development of compensatory strategies promoting independence in old age. Research on aging-related memory decline has mainly focused on encoding and retrieval. However, some findings suggest that memory deficits may at least partly be due to impaired consolidation. To date, it remains elusive whether aging-related memory decline results from defective consolidation. This study examined age effects on consolidation-related neural mechanisms and their susceptibility to interference using functional magnetic resonance imaging data from 13 younger (20-30 years, 8 female) and 16 older (49-75 years, 5 female) healthy participants. fMRI was performed before and during a memory paradigm comprised of encoding, consolidation, and retrieval phases. Consolidation was variously challenged: (1) control (no manipulation), (2) interference (repeated stimulus presentation with interfering information), and (3) reminder condition (repeated presentation without interfering information). We analyzed the fractional amplitude of low-frequency fluctuations (fALFF) to compare brain activity changes from pre- to post-encoding rest. In the control condition, fALFF was decreased in the left supramarginal gyrus, right middle temporal gyrus, and left precuneus but increased in parts of the occipital and inferior temporal cortex. Connectivity analyses between fALFF-derived seeds and network ROIs revealed an aging-related decrease in the efficiency of functional connectivity (FC) within the ventral stream network and between salience, default mode, and central executive networks during consolidation. Moreover, our results indicate increased interference susceptibility in older individuals with dynamics between salience and default mode networks as a neurophysiological correlate. Conclusively, aging-related memory decline is partly caused by inefficient consolidation. Memory consolidation requires a complex interplay between large-scale brain networks, which qualitatively decreases with age.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Fassbender, Ronja V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Risius, Okka J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dronse, Julian UNSPECIFIED UNSPECIFIED UNSPECIFIED Richter, Nils UNSPECIFIED UNSPECIFIED UNSPECIFIED Gramespacher, Hannes UNSPECIFIED orcid.org/0000-0002-9980-4978 UNSPECIFIED Befahr, Qumars UNSPECIFIED UNSPECIFIED UNSPECIFIED Fink, Gereon R. UNSPECIFIED orcid.org/0000-0002-8230-1856 UNSPECIFIED Kukolja, Juraj UNSPECIFIED orcid.org/0000-0003-1569-3287 UNSPECIFIED Onur, Oezguer A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-677137
DOI:	10.3389/fnagi.2022.780630
Journal or Publication Title:	Front. Aging Neurosci.
Volume:	14
Date:	2022
Publisher:	FRONTIERS MEDIA SA
Place of Publication:	LAUSANNE
ISSN:	1663-4365
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language RESTING-STATE FMRI; OLDER-ADULTS; DEFAULT-MODE; EXECUTIVE FUNCTIONS; ALZHEIMERS-DISEASE; FUNCTIONAL DECLINE; MOTION CORRECTION; HIPPOCAMPAL; CONNECTIVITY; CORTEX Multiple languages Geriatrics & Gerontology; Neurosciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67713