皮质厚度,体积和记忆性能对年龄差异在神经恢复场景信息的神经恢复中缓和的影响
bioRxiv : the preprint server for biology
|February 20, 2025
概括
老年人对场景的神经恢复较弱,这与大脑体积减少有关. 这种与年龄相关的皮质体积下降完全解释了记忆差异. 场景恢复强度还可以独立预测记忆性能.
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
- 神经成像是一种神经成像.
背景情况:
- 神经恢复强度与情节性记忆检索忠实度相关.
- 较年长的成年人表现出较年轻的成年人相比较弱的神经恢复,特别是在场景信息方面.
- 与年龄相关的皮质厚度和体积的下降与认知能力的下降有关.
研究的目的:
- 为了研究皮质体积,皮质厚度,年龄和与场景相关的神经恢复之间的关系.
- 检查皮质体积和厚度在场景恢复中与年龄相关的差异中的调解作用.
- 为了确定场景恢复强度是否可以预测源内存性能,而不依赖于年龄和皮质体积.
主要方法:
- 分析了健康的年轻人和老年人的fMRI数据.
- 在对场景图像的源记忆测试中,从fMRI数据中估计了恢复指数.
- 多重回归分析检查了年龄,皮质厚度和皮质体积对现场恢复的影响.
主要成果:
- 在恢复强度,皮质厚度和皮质体积方面观察到显著的年龄差异.
- 皮质体积完全介导了年龄对神经恢复在近海马位区域 (PPA) 和中间位区域 (MPA) 的影响.
- PPA恢复强度预测源记忆性能,独立于皮质体积或年龄.
结论:
- 场景恢复的年龄相关差异是由皮质体积的减少介导的.
- 皮质体积是一个关键因素,是场景处理中与年龄相关的记忆力下降的基础.
- PPA中的神经恢复强度与记忆性能和潜在的大脑结构有关.
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