期刊
FRONTIERS IN AGING NEUROSCIENCE
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fnagi.2018.00006
关键词
immediate recall; delayed recall; default mode network; functional connectivity; regional homogeneity
资金
- National Natural Science Foundation of China [31671157, 31470998, 61673374, 31271108, 31200847]
- Beijing Municipal Science & Technology Commission [Z171100000117006]
- Pioneer Initiative of the Chinese Academy of Sciences, Feature Institutes Program [TSS-2015-06]
- CAS Key Laboratory of Mental Health, Institute of Psychology [KLMH2014ZK02, KLMH2014ZG03]
While the neural correlates of age-related decline in episodic memory have been the subject of much interest, the spontaneous functional architecture of the brain for various memory processes in elderly adults, such as immediate recall (IR) and delayed recall (DR), remains unclear. The present study thus examined the neural correlates of age-related decline of various memory processes. A total of 66 cognitively normal older adults (aged 60-80 years) participated in this study. Memory processes were measured using the Auditory Verbal Learning Test as well as resting-state brain images, which were analyzed using both regional homogeneity (ReHo) and correlation-based functional connectivity (FC) approaches. We found that both IR and DR were significantly correlated with the ReHo of these critical regions, all within the default mode network (DMN), including the parahippocampal gyrus, posterior cingulate cortex/precuneus, inferior parietal lobule, and medial prefrontal cortex. In addition, DR was also related to the FC between these DMN regions. These results suggest that the DMN plays different roles in memory retrieval across different retention intervals, and connections between the DMN regions contribute to memory consolidation of past events in healthy older people.
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