4.7 Article

A comprehensive score reflecting memory-related fMRI activations and deactivations as potential biomarker for neurocognitive aging

Journal

HUMAN BRAIN MAPPING
Volume 42, Issue 14, Pages 4478-4496

Publisher

WILEY
DOI: 10.1002/hbm.25559

Keywords

cognitive aging; episodic memory; fMRI; hippocampus; memory impairment; subsequent memory effect

Funding

  1. Deutsche Forschungsgemeinschaft [RI 2964-1, SFB 1436, SFB 779, TP A05, TP A08]
  2. European Regional Development Fund, Research Alliance Autonomy in Old Age
  3. Ministerium fur Wissenschaft und Wirtschaft, Land Sachsen-Anhalt

Ask authors/readers for more resources

As older adults, especially those at risk for dementia, show declines in memory performance, fMRI can be used to detect alterations in memory network activity. The FADE and FADE-SAME scores are developed as potential biomarkers for successful aging and are correlated with behavioral measures of cognitive aging.
Older adults and particularly those at risk for developing dementia typically show a decline in episodic memory performance, which has been associated with altered memory network activity detectable via functional magnetic resonance imaging (fMRI). To quantify the degree of these alterations, a score has been developed as a putative imaging biomarker for successful aging in memory for older adults (Functional Activity Deviations during Encoding, FADE; Duzel et al., Hippocampus, 2011; 21: 803-814). Here, we introduce and validate a more comprehensive version of the FADE score, termed FADE-SAME (Similarity of Activations during Memory Encoding), which differs from the original FADE score by considering not only activations but also deactivations in fMRI contrasts of stimulus novelty and successful encoding, and by taking into account the variance of young adults' activations. We computed both scores for novelty and subsequent memory contrasts in a cohort of 217 healthy adults, including 106 young and 111 older participants, as well as a replication cohort of 117 young subjects. We further tested the stability and generalizability of both scores by controlling for different MR scanners and gender, as well as by using different data sets of young adults as reference samples. Both scores showed robust age-group-related differences for the subsequent memory contrast, and the FADE-SAME score additionally exhibited age-group-related differences for the novelty contrast. Furthermore, both scores correlate with behavioral measures of cognitive aging, namely memory performance. Taken together, our results suggest that single-value scores of memory-related fMRI responses may constitute promising biomarkers for quantifying neurocognitive aging.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available