The Role of Age-related Sleep EEG Changes in Memory Decline: Experiments and Computational Modeling

Overview

Journal Annu Int Conf IEEE Eng Med Biol Soc

Specialty Biomedical Engineering

Date 2023 Dec 12

PMID 38083499

Authors

Yina Wei

Manli Luo

Xun Mai

Linqing Feng

Tao Tang

Dongping Yang

Giri P Krishnan

Maxim Bazhenov

Affiliations

Soon will be listed here.

Abstract

The slow oscillation (SO) observed during deep sleep is known to facilitate memory consolidation. However, the impact of age-related changes in sleep electroencephalography (EEG) oscillations and memory remains unknown. In this study, we aimed to investigate the contribution of age-related changes in sleep SO and its role in memory decline by combining EEG recordings and computational modeling. Based on the detected SO events, we found that older adults exhibit lower SO density, lower SO frequency, and longer Up and Down state durations during N3 sleep compared to young and middle-aged groups. Using a biophysically detailed thalamocortical network model, we simulated the "aged" brain as a partial loss of synaptic connections between neurons in the cortex. Our simulations showed that the changes in sleep SO properties in the "aged" brain, similar to those observed in older adults, resulting in impaired memory consolidation. Overall, this study provides mechanistic insights into how age-related changes modulate sleep SOs and memory decline.Clinical Relevance- This study contributes towards finding feasible biomarkers and target mechanism for designing therapy in older adults with memory deficits, such as Alzheimer's disease patients.

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