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相关概念视频

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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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相关实验视频

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Cerebral Blood Flow-Based Resting State Functional Connectivity of the Human Brain using Optical Diffuse Correlation Spectroscopy
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超老化功能连接学从静止状态的功能性MRI.

Bram R Diamond1,2,3, Jaiashre Sridhar1, Jessica Maier4

  • 1Mesulam Center for Cognitive Neurology and Alzheimer's Disease, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.

Brain communications
|July 9, 2024
PubMed
概括
此摘要是机器生成的。

大脑网络内部和大脑网络之间的功能连接 (FC) 并没有区分超级衰老与典型的认知衰老. 这一发现表明,FC不是老年人特殊记忆的主要驱动因素.

关键词:
记忆 记忆 记忆 记忆 记忆神经成像是一种神经成像.神经心理学神经心理学成功的衰老成功的衰老

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科学领域:

  • 神经科学是一个神经科学.
  • 认知衰老研究 认知衰老研究
  • 神经成像是一种神经成像.

背景情况:

  • 神经认知网络的功能连接 (FC) 与阿尔茨海默病和相关痴呆症 (ADRD) 的认知衰退有关.
  • 在典型的认知衰老和特殊的认知表现 (超级衰老) 中,FC 的作用是不一致的,可能是由于方法上的限制.
  • 超级衰老的特点是保持或增强认知功能,特别是情节性记忆,在80岁及以上的个体中.

研究的目的:

  • 与认知平均老年人相比,研究超级老龄化表型中网络内和网络间FC的差异.
  • 在七个大型静态网络和默认模式网络 (DMN) 的子组件中检查FC.
  • 评估网络隔离作为超级衰老和平均认知衰老之间的潜在差异化因素.

主要方法:

  • 使用休息状态功能性MRI (rs-fMRI) 来比较24名超级老年人的FC和16名认知平均老年人对照 (OAC).
  • 分析了七个大规模网络内部和之间以及六个DMN子组件内的FC.
  • 对比了网络分离指数,并使用了独立的t测试,对组分析进行了多重比较校正.

主要成果:

  • 在SuperAgers和OAC之间的人口特征方面没有发现显著差异.
  • 网络内部的FC,网络间的FC和网络隔离并没有显著地区分SuperAgers和OAC.
  • 包括DMN子组件在内的大规模网络或大规模网络之间的FC不是超级老化与平均老化的主要区别因素.

结论:

  • 大规模神经认知网络中的功能连接或大规模神经认知网络之间的功能连接似乎不是超级衰老中特殊记忆性能的主要驱动因素.
  • 这些发现有助于区分成功的认知衰老的神经支柱与与ADRD等神经退行性疾病相关的神经支柱.
  • 未来的研究可能会探索其他神经机制,这些神经机制有助于超级衰老的表型.