异常的海马亚区域网络与情节性记忆衰退相关,在amnestic轻度认知障碍中
Shengxiang Liang1, Li Huang2, Jingfang Zhu2
1National-Local Joint Engineering Research Center of Rehabilitation Medicine Technology, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China; Rehabilitation Industry Institute, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China; Traditional Chinese Medicine Rehabilitation Research Center of State Administration of Traditional Chinese Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China; Fujian Key Laboratory of Cognitive Rehabilitation, Affiliated Rehabilitation Hospital of Fujian University of Traditional Chinese Medicine, Fuzhou 350001, China.
缓解记忆障碍 (aMCI) 的情节性记忆下降与海马网络整合的破坏有关. 关键区域,如parasubiculum和presubiculum显示改变了连接,影响记忆功能.
科学领域:
- 神经科学是一个神经科学.
- 认知神经学 认知神经学
- 医疗成像医学成像
背景情况:
- Amnestic轻度认知障碍 (aMCI) 是通过显著的情节性记忆丧失来定义的.
- 海马及其亚区域集成对情节性记忆至关重要.
- 了解aMCI中的网络变化对于识别疾病机制至关重要.
研究的目的:
- 研究患有aMCI的个体中海马亚区域网络连接和拓学的变化.
- 确定这些网络变化和情节性记忆缺陷之间的关系.
主要方法:
- 招募了患有aMCI (n=32) 的参与者,并匹配了认知正常的对照 (n=32).
- 评估了使用韦克斯勒记忆量级修订逻辑记忆子测试的情节性记忆.
- 获取休息状态的功能性MRI数据,以构建海马子区域网络并分析功能连接和拓性质.
主要成果:
- 患有aMCI的个体表现出海马亚区域网络集成受损,由增加的路径长度和降低的整体效率证明.
- 在特定的海马子区域之间观察到功能连接的减少,包括帕拉苏比库勒和牙状的颗粒和分子层.
- 节点分析确定了parasubiculum和presubiculum中节点集中度和节点效率的降低,这与情节性记忆性能相关.
结论:
- 在aMCI中出现的情节性记忆障碍与改变的海马亚区域网络集成有关.
- 帕萨苏比库勒姆和普萨苏比库勒姆 (parasubiculum和presubiculum) 成为潜在的关键区域,与MCI中观察到的记忆缺陷有关.
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