Sleep disturbances and their correlation with memory impairment in patients with Alzheimer's disease and amnestic mild cognitive impairment.

IF 2.8 Q2 NEUROSCIENCES
Journal of Alzheimer's disease reports Pub Date : 2025-01-13 eCollection Date: 2025-01-01 DOI:10.1177/25424823241309063
Linyang Cui, Yahui Wan, Yunyao Lu, Meng Meng, Nan Zhang
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Abstract

Background: Episodic memory impairment is the core clinical feature of patients with typical Alzheimer's disease (AD) at an early stage. Since sleep plays a very important role in memory consolidation, the relationship between memory impairment and sleep disorders in AD patients is worthy of investigation.

Objective: To investigate sleep disturbances and their correlations with memory impairment in patients with AD and amnestic mild cognitive impairment (aMCI).

Methods: Forty-three patients with AD, 43 patients with aMCI, and 43 cognitively unimpaired controls (CUCs) were recruited and subjected to memory assessment via the Hopkins Verbal Learning Test-Revised and objective sleep evaluation via polysomnography (PSG).

Results: The total sleep time and the percentages of nonrapid eye movement (NREM) sleep stage 3 (N3) and the rapid eye movement (REM) were lower, while the percentages of NREM sleep stage 2 (N2) were greater in the AD and aMCI groups than in the CUC group (all p < 0.01). Compared with the CUC group, the AD group also presented a longer sleep latency and higher NREM sleep stage 1 (N1) percentage, apnea-hypopnea index (AHI), periodic limb movements during sleep index (PLMSI), and arousal index (AI). Both total learning scores and delayed recall scores were positively correlated with the N3 sleep percentage and negatively correlated with the AHI and PLMSI (all p < 0.01). Recognition scores were positively correlated with the N3 sleep percentage and negatively correlated with the AI (all p < 0.01).

Conclusions: Our results suggest that sleep disturbance is correlated with learning and memory disability in AD and aMCI patients. PSG is useful for screening and monitoring AD.

阿尔茨海默病和遗忘性轻度认知障碍患者的睡眠障碍及其与记忆障碍的相关性
背景:情景记忆障碍是典型阿尔茨海默病(AD)患者早期的核心临床特征。由于睡眠在记忆巩固中起着非常重要的作用,因此AD患者的记忆障碍与睡眠障碍之间的关系值得研究。目的:探讨AD合并遗忘性轻度认知障碍(aMCI)患者的睡眠障碍及其与记忆障碍的相关性。方法:招募43例AD患者、43例aMCI患者和43例认知功能未受损的对照组(CUCs),采用霍普金斯语言学习测验(Hopkins Verbal Learning Test-Revised)进行记忆评估,并采用多导睡眠图(PSG)进行客观睡眠评估。结果:AD组和aMCI组的总睡眠时间、非快速眼动(NREM)睡眠阶段3 (N3)和快速眼动(REM)的百分比均低于CUC组,而非快速眼动(NREM)睡眠阶段2 (N2)的百分比均高于CUC组(均p)。结论:AD和aMCI患者的睡眠障碍与学习记忆障碍相关。PSG可用于筛查和监测AD。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
2.80
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