在健康的老年人中,急性自行车运动和海马体子场功能和微观结构
Daniel D Callow1,2, Yash Kommula1,2, Craig E L Stark3
1Department of Kinesiology, University of Maryland, College Park, Maryland, USA.
Hippocampus
|August 1, 2023
概括
在老年人中,单次适度至剧烈的有氧运动可能会暂时损害记忆力区分能力,并降低牙状回形 (DG) 和CA3海马子场的活动.
科学领域:
- 神经科学是一个神经科学.
- 老年学是一门学科.
- 运动生理学 运动生理学
背景情况:
- 衰老会对海马体的子区域产生负面影响,如牙状回形 (DG) 和CA3,这些子区域对于记忆过程至关重要,如记忆力歧视 (MD).
- 急性有氧运动可以暂时影响大脑功能和微观结构,但其对老年人海马子子子场完整性的影响尚不清楚.
研究的目的:
- 为了研究单次中度至强度有氧运动对健康老年人双边海马子的功能和微观结构的影响.
- 用高分辨率功能磁共振成像 (fMRI) 和扩散成像来比较这些效应与坐着的休息状态.
主要方法:
- 在35名老年人在fMRI期间执行记忆力歧视任务和31人接受扩散成像时使用了主体内设计.
- 参与者完成了20分钟的有氧运动和坐着休息的条件.
主要成果:
- 运动后,参与者表现较差的MD表现,特别是在更高的感知力度下.
- 运动与DG/CA3子领域的MD相关活动减少有关,但不是CA1.
- 在DG/CA3中,运动与较低的神经元密度指数 (NDI) 有关,这与整个大脑灰质扩散无关.
结论:
- 在老年人中,中度至强度的有氧运动可能会暂时抑制MD性能和DG/CA3活动和NDI,可能通过神经炎症途径.
- 需要进一步的研究来确定这些急性变化是否有益,以及它们与长期炼的关系.
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