腰椎脊柱Shox2内部神经元从小鼠的侧面 paragigantocellular核接收单突触刺激输入
Shayna Singh1, Lihua Yao1, Kimberly J Dougherty1
1Marion Murray Spinal Cord Research Center, Department of Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, PA 19129, USA.
iScience
|January 26, 2026
概括
发动机启动涉及脑干路径. 研究人员发现,从侧向巨细胞核 (LPGi) 到脊髓中的Shox2内部神经元之间有直接的激发性连接,这对于脊椎动物的运动至关重要.
科学领域:
- 神经科学是一个神经科学.
- 发动机控制器的控制器
- 脊髓研究研究 脊髓研究
背景情况:
- 脊椎动物的运动是由脊髓网络控制的,由脊柱上中心启动.
- 表达Shox2的脊髓内神经元 (Shox2内神经元) 参与产生运动节奏.
- 视网脊髓神经元,特别是横向超巨细胞核 (LPGi) 中的刺激神经元,为发动机启动提供下降驱动.
研究的目的:
- 在成年小鼠中研究LPGi刺激神经元和腰部Shox2内部神经元之间的直接突触连接.
- 阐明LPGi-Shox2通路在脊椎动物运动启动中的作用.
主要方法:
- 利用单突触受限狂犬病追踪来精确追踪神经元连接的病毒.
- 采用前向跟踪技术来确认路径的方向性.
- 进行了电生理学记录,以测量Shox2内部神经元中的刺激后突触潜能 (EPSPs).
主要成果:
- 从LPGi中的激发性神经元到腰部Shox2内部神经元的直接突触连接被证明.
- 通过使用多种追踪方法,证实了从腹部尾髓到Shox2内部神经元的这种刺激输入.
- 在LPGi刺激后,电生理学验证了Shox2内部神经元中的功能激发后突触潜力.
结论:
- 一个 Shox2 内神经元的子集接收到直接的单突触刺激输入从LPGi.
- 这种已识别的神经通路为启动运动提供了潜在的基质.
- 强调LPGi在协调脊柱运动回路的脊柱上控制方面的重要性.
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