洞察人类胎儿大脑中短关联纤维形成的时间和空间动态
Bo Li1,2, Željka Krsnik3, Lana Pierotich1,2
1Computational Radiology Laboratory, Boston Children's Hospital, Boston, MA, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
这项研究揭示了使用胎儿MRI在人类大脑中短关联纤维 (SAF) 的产前发展. 它绘制了它们的早期形成和成熟,为神经发育障碍提供了洞察力.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 医疗成像医学成像
背景情况:
- 短关联纤维 (SAF) 对于局部皮质连接和功能专业化至关重要.
- 它们的产前发育在很大程度上是未知的,这阻碍了对神经发育障碍的理解.
研究的目的:
- 重建和描述人类大脑SAF通路的子宫内发育.
- 建立皮质电缆的产前参考,并调查神经发育障碍的起源.
主要方法:
- 在243个胎儿身上利用先进的胎儿扩散MRI.
- 使用经过组织学验证的框架进行途径重建.
- 在临界产前发育期间跟踪SAF体积和微观结构轨迹.
主要成果:
- 在状折叠之前,SAFs出现,最初是松散的通道,然后重新组织成U形捆.
- 成熟遵循传感运动与关联的梯度,与皮层发育并行.
- 非线性,捆绑特定的轨迹显示多相成熟,涉及亚板动态,轴突连贯性和髓化.
结论:
- 这项研究提供了人类大脑SAF发育的第一个子宫内重建.
- 建立了皮层电线的产前参考.
- 为研究神经发育障碍的起源提供了工具.
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