休息活动节律和海马网络完整性的与年龄有关的障碍:一项探索性研究
Aurore Jouvencel1, Bixente Dilharreguy1, Marion Baillet2
1INCIA, EPHE, Université PSL, Univ Bordeaux, CNRS, 146, Rue Léo Saignat, 33076, Bordeaux, France.
Neurobiology of sleep and circadian rhythms
|January 21, 2025
概括
老年人休息活动节律恶化与前海马体积减少有关,这表明存在脆弱性因素. 干预措施应针对老年人口中的这些节奏.
科学领域:
- 神经科学是一个神经科学.
- 老年学是一门学科.
- 时间生物学 时间生物学
背景情况:
- 认知障碍在老年人群中越来越令人担忧.
- 休息活动节奏对于生理调节至关重要,可随着年龄的增长而降低.
- 海马在记忆中起着至关重要的作用,易受衰老过程的影响.
研究的目的:
- 研究老年人休息活动节律的纵向变化.
- 检查休息活动节奏变化与海马网络结构和功能完整性之间的关联.
- 为了确定节律障碍对老化中的大脑健康的潜在有害影响.
主要方法:
- 这是一项长度研究,对33名参与者 (平均年龄75.2岁) 进行7年间隔的评估.
- 用于测量休息活动节奏 (相对幅度,稳定性,碎片化) 的动图.
- 脑成像 (MRI) 用于海马体体积细分和静止状态功能连接性分析.
主要成果:
- 虽然睡眠模式保持稳定,但休息活动节奏在七年内显著恶化 (相对幅度和稳定性下降,碎片化增加).
- 休息活动节律的恶化与前海马体体积的减少有显著的相关性 (p <0.05,校正).
- 休息活动节律变化与海马功能连接之间没有发现显著的相关性.
结论:
- 在70岁以上的个体中,休息活动节律的退化可能是导致海马脆弱性的因素.
- 这些发现凸显了保持健康的休息活动模式对于保持老年人大脑健康的重要性.
- 针对休息活动节奏的预防策略可能对老年人群有益.
相关概念视频
01:19Role of Hippocampus in Memory
157
The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
157
01:24Sleep-Wake Cycles
1.2K
Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
1.2K
01:26Aging
36
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
36
02:19Circadian Rhythms and Gene Regulation
4.0K
The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
4.0K