精神分裂症中的距离和等级依赖的功能性失联性及其与皮质微观结构的关联
Isaac David1,2, Shuntaro Sasai1, Felipe Branco de Paiva1
1Department of Psychiatry, University of Wisconsin, Madison, Wisconsin, United States of America.
medRxiv : the preprint server for health sciences
|August 6, 2025
概括
精神分裂症表现出明显的连接性变化:与微观结构相关的感觉区域的短距离连接减少,在没有微观结构联系的其他区域的长距离连接增加.
科学领域:
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
- 神经成像是一种神经成像.
背景情况:
- 精神分裂症与广泛的功能性失联性有关.
- 这些变化的空间规模和结构基础,特别是短距离连接,尚不清楚.
研究的目的:
- 为了研究精神分裂症中距离依赖的功能连接强度 (FCS).
- 探索功能连接和皮层内微观结构之间的关系.
主要方法:
- 应用顶点智能,距离依赖的FCS分析到静止状态fMRI数据.
- 按地理距离划分FCS并根据皮质层次结构分析.
- 评估T1w/T2w比率和个性化数据驱动功能连接密度 (idFCD) 作为微结构代理.
主要成果:
- 精神分裂症患者在背部主要体感皮质中显示出减少的短距离FCS,与微观结构异常共定位.
- 在无微结构差异的跨模区域 (例如,precuneus) 观察到长距离FCS的增加.
- 层次分析揭示了初级网络中的结构-功能中断,以及跨模式地区相对FCS的增加.
结论:
- 精神分裂症表现出两种不同的连接模式:微观结构相关的初级感官区域的短期减少,以及缺乏局部结构关联的跨模区域的长期增加.
- 突出了主要区域中短距离连接中断的作用,并为分析精神分裂症中大脑连接提供了一个新的框架.
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