早期精神病的特点是纤维结构中白质异常,这些结构支持局部连接
Yoshito Saito1, Warda T Syeda1,2, Cassandra M J Wannan1,3,4
1Department of Psychiatry, The University of Melbourne, Carlton, VIC, Australia.
medRxiv : the preprint server for health sciences
|July 14, 2025
概括
表面白质 (SWM) 变化在早期精神病中很明显,影响局部大脑连接. 先进的MRI揭示了广泛的SWM纤维密度减少与认知缺陷和皮质变化相关的精神病谱系障碍患者.
科学领域:
- 神经成像是一种神经成像.
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
背景情况:
- 精神分裂症谱系障碍 (SSD) 涉及到大脑连接的破坏.
- 由表面白物质 (SWM) 支持的本地网络完整性越来越被认为是至关重要的.
- 由于SWM的发育轨迹和与皮质的接近,它在SSD中可能很脆弱,但在传统的MRI中对其进行研究具有挑战性.
研究的目的:
- 在早期精神病患者的SWM中研究纤维密度 (FD),使用高级扩散MRI.
- 为了比较早期精神病和对照组之间的SWM FD.
- 探索SWM变化与皮质结构以及认知功能之间的关系.
主要方法:
- 使用高级扩散MRI来评估表面白质中的纤维密度 (FD).
- 研究了78名患有早期精神病的个体和78名年龄和性别匹配的对照.
- 与皮质厚度,表面积和认知指标 (处理速度,工作记忆) 相关联的SWM FD.
主要成果:
- 在早期精神病组中观察到SWMFD的广泛减少,特别是在,,和岛屿区域.
- 两组之间没有检测到分数异构 (FA) 的显著差异,突出了FD的敏感性.
- 减少SWM FD与皮质厚度和表面积的减少相关,并与处理速度和工作记忆的受损有关.
- SWM调解了皮质结构与前额和顶部区域的处理速度之间的联系.
结论:
- 表面白质 (SWM) 是一个关键的大脑区域,在早期精神病谱系障碍 (SSD) 中表现出广泛的变化.
- 先进的扩散MRI技术对于表征SWM变化至关重要,这些变化不能通过传统的张量成像检测到.
- 这些SWM变化具有功能相关性,与认知障碍和皮质结构协调变化相关.
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