与典型的衰老相比,成功的认知衰老与较厚的前环皮质和较低的沉积有关
Stefania Pezzoli1,2, Joseph Giorgio1,3, Adam Martersteck1
1Helen Wills Neuroscience Institute, University of California, Berkeley, California, USA.
概括
成功的认知衰老 (SA) 显示了跨定义的一致的大脑特征,包括更大的皮质厚度和海马体积,以及对病理的抵抗力.
科学领域:
- 神经科学是一个神经科学.
- 衰老研究研究 衰老研究
- 认知科学 认知科学
背景情况:
- 定义成功的认知衰老 (SA) 和它的神经支缺乏共识.
- 现有的SA定义各不相同,需要检查它们的一致性和相关的神经生物学标志物.
研究的目的:
- 评估成功认知衰老 (SA) 的不同定义之间的一致性.
- 为了确定与SA相关的常见神经机制,无论使用的具体定义如何.
主要方法:
- 与SA的四个不同的定义进行了比较,包括一种新的认知年龄差距 (SA-CAG) 测量.
- 使用了情节性记忆 (SA-EM) 和非记忆认知 (SA-NM) 的复合分数,以及加利福尼亚语言学习测试 (SA-CVLT).
- 分析了神经成像数据,包括皮质厚度,海马体积和内腔 (F-Flortaucipir) 和粉样β沉积.
主要成果:
- 在四个SA定义中发现了相当或中等的协议.
- 与典型的衰老 (TA) 相比,确定了较大的皮层厚度,特别是在前带状和中带状皮层,以及大多数SA群体中的中间叶.
- 在除SA-NM外的所有SA组中观察到更大的海马体积,在所有SA组中观察到更低的内腔吸收.
结论:
- 无论具体定义如何,成功的认知衰老 (SA) 的特点是皮层完整性得到保护,特别是在前带皮层.
- 内皮层对陶病理的抵抗是SA的关键神经生物学特征.
- 强大的皮质结构和减少的陶积累的结合可能定义了成功的认知衰老.
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