前额氧化动态的生理复杂性与年龄和执行功能有关:一项探索性研究
Yinglu Hong1, Junhong Zhou2,3, Wanting Yu2
1School of Sport Medicine and Physical Therapy, Beijing Sport University, Beijing, China.
概括
衰老会减少前额叶皮层 (PFC) 的氧化复杂性,影响执行功能. 老年人较低的复杂性与较慢的任务表现相关,突出了与年龄相关的血液动力学变化.
科学领域:
- 神经科学是一个神经科学.
- 生理学 生理学 生理学
- 认知科学 认知科学
背景情况:
- 前额叶皮层 (PFC) 氧化血动力学涉及复杂的多层次调节.
- 衰老可能会减少PFC氧化调节的生理复杂性.
- 这项研究调查了PFC氧化复杂性的与年龄相关的变化及其与执行功能的联系.
研究的目的:
- 描述年龄对PFC氧化复杂性的影响.
- 检查PFC氧化复杂性与执行n-back任务性能之间的关系.
主要方法:
- 功能近红外光谱 (fNIRS) 测量了24名年轻人和27名老年人的氧化 (HbO2) 和脱氧 (HHb).
- 参与者完成了休息 (空白),简单 (IdX) 和执行 (2-back) 任务.
- 多尺度分析量化了信号的复杂性.
主要成果:
- 年长的成年人比年轻的成年人显示出明显较低的HbO2和HHb复杂性.
- 与空白任务相比,两组都在IdX和2-back任务中表现出更高的复杂性.
- 较大的基线复杂性与更快的反应时间相关;在任务中增加的复杂性与较小的反应时间增加相关.
结论:
- 通过fNIRS测量的PFC氧化复杂性反映了衰老对前额血动力学的影响.
- 减少复杂性与老年人执行功能表现受损有关.
- 基于fNIRS的复杂度指标可以作为与年龄相关的认知和血液动力学变化的生物标志物.
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