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Published on: July 26, 2019
The association between brain oscillatory activity and immediate memory under different magnetoencephalography
Xiaoyu Wang1, Yuming Peng2, Bing Yan2
1Department of Neurology, Shandong Provincial Hospital affiliated to Shandong First Medical University, Jinan, Shandong, China; Key Laboratory of Endocrine Glucose & Lipids Metabolism and Brain Aging, Ministry of Education; Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China.
Older adults with increased beta-band oscillatory activity in the hippocampus showed poorer immediate memory performance, especially during an animal recall task. This brain activity pattern may indicate a potential biomarker for memory function.
Area of Science:
- Neuroscience
- Cognitive Science
- Gerontology
Background:
- Brain oscillatory activity is linked to memory, but population studies on immediate memory in older adults using magnetoencephalography (MEG) are limited.
- Understanding these neural correlates is crucial for identifying age-related memory decline.
Purpose of the Study:
- To investigate the association between brain oscillatory activity (event-related desynchronization - ERD) across different frequency bands and immediate memory function in older adults.
- To compare these associations under two distinct task paradigms (animal and line) using optically pumped magnetometer MEG (OPM-MEG).
Main Methods:
- A population-based study involving 90 older adults using OPM-MEG to measure band-specific ERD in 94 brain regions.
- Two paradigms (animal and line) were employed, with immediate memory assessed via the Auditory Verbal Learning Test (AVLT).
- Multivariable linear regression and false discovery rate (FDR) correction were used for statistical analysis.
Main Results:
- Increased beta-band ERD in the bilateral hippocampus was significantly associated with lower immediate memory scores in both paradigms.
- The animal paradigm revealed significant associations between increased ERD (theta, alpha, beta bands) in the hippocampus and lower immediate memory during retrieval.
- No significant associations were found in the line paradigm after FDR correction.
Conclusions:
- Increased beta-band ERD during memory retrieval, particularly in the animal paradigm, is linked to diminished immediate memory function in older adults.
- Task-related ERD, especially in the beta band, shows potential as a biomarker for immediate memory function in aging populations.
