在老年人中,休息状态大脑功能下降预测了扩大的表达动量
Xiaokang Jin1, Juntao Chen2, Shizhen Yan3
1Faculty of Psychology, Tianjin Normal University.
Psychology and aging
|July 29, 2024
概括
年长的成年人表现出更强的表现动量 (RM) 效应,可能作为与年龄相关的视觉皮层活动下降的功能补偿. 这项研究使用神经成像来探索这些与年龄相关的差异.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 人类衰老研究研究
背景情况:
- 代表动量 (RM) 是一种与视觉皮层功能相关的适应性视觉感知机制.
- 与年龄相关的视觉皮层功能下降可能会影响RM,但这仍然是未经研究的.
研究的目的:
- 为了研究与年龄相关的代表势头 (RM) 效应的差异.
- 使用静止状态fMRI探索这些差异背后的神经基质.
主要方法:
- 在使用光标定位任务的老年人 (N=82) 和年轻人 (N=74) 中比较RM.
- 利用静态fMRI测量视觉皮层中低频波动 (ALFF) 和区域均性 (ReHo) 的幅度.
主要成果:
- 与年轻人相比,老年人表现出显著增加的RM效应.
- 老年人显示在视觉皮层区域的ALFF和ReHo下降.
- 在特定视觉区域的ALFF/ReHo与老年人RM效应之间发现了负相关性.
结论:
- 在老年人中增加的RM可能作为与年龄相关的视觉皮层变化的功能补偿.
- 视觉区域的ALFF和ReHo是与年龄相关的RM差异的潜在神经相关物.
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