单个voxel自相对应反映了叶发作中的海马体功能
Nichole R Bouffard1,2,3, Sam Audrain4,5, Ali M Golestani6,7
1Department of Psychology, University of Toronto, Toronto, Ontario, Canada.
Imaging neuroscience (Cambridge, Mass.)
|January 26, 2026
概括
叶 (TLE) 改变海马的功能动态,在患者中显示较长的内在时间尺度. 在前海马体中这些时间模式的更大保存与TLE患者的更好的记忆性能相关.
科学领域:
- 神经科学是一个神经科学.
- 功能神经成像 功能神经成像
- 的研究研究.
背景情况:
- 单个声元中的血液-氧气水平依赖 (BOLD) 信号的自相关分析可以揭示健康个体海马长轴沿着行为相关的时间动态.
- 了解大脑功能障碍如何影响这些时间动态对于诊断和管理神经疾病至关重要.
研究的目的:
- 为了研究海马功能障碍在单边叶 (TLE) 中对单声细胞自身相关性的影响.
- 为了比较TLE患者 (有或没有 mesial temporal sclerosis - MTS) 和健康对照者之间的海马体自身相关性模式.
- 探索海马体自身相关性集群保护和TLE患者的记忆表现之间的关系.
主要方法:
- 采用单声元自相对应方法和数据驱动的集群方法,根据静止状态功能磁共振成像 (fMRI) 数据对海马体进行细分.
- 与健康对照对比左侧和右侧TLE,MTS和没有MTS的患者的自相关性模式.
- 评估了集群保存 (与控制集群的空间重叠) 以及其与口语和视觉空间记忆得分的相关性.
主要成果:
- 患有左侧TLE的患者表现出比对照人更长的内在时间尺度 (更高的自身相关性),特别是在前中间海马中,无论半球是否是性.
- 尽管已知其结构影响,但没有观察到 mesial temporal sclerosis (MTS) 对单声素自身相关性的显著影响.
- 在TLE患者中,前中间海马体中较大的集群保存与更好的口语和视觉空间记忆性能有关.
结论:
- 根据自相关性测量,海马活动的时空动态在TLE中发生了变化.
- 这些变化的动态,特别是前中间海马体内较长的内在时间尺度,可以作为TLE功能完整性的指标.
- 海马自相对应模式及其保存与TLE患者的认知功能,特别是记忆有关,这表明它有可能作为生物标志物.
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