惯性负荷在运动皮层中的输出-零签名
Eric A Kirk1, Keenan T Hope1, Samuel J Sober2
1Department of Neurosciences, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
Nature communications
|August 24, 2024
概括
运动皮层在肢体负荷变化时的运动过程中表现出显著的动态变化,即使运动输出不受其失活的影响. 这表明在将自愿行为与节奏运动相结合时,皮层有潜在的作用.
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
- 系统神经科学 系统神经科学
背景情况:
- 协调运动需要持续的神经补偿机械负载变化.
- 运动皮质对于肢体的自愿运动和负载对抗至关重要.
- 运动皮层在节奏性,旋转性运动中的负载补偿中的作用仍然不清楚.
研究的目的:
- 调查运动皮层在移动过程中对负载补偿的贡献.
- 了解皮层动力学如何受到节奏运动期间改变的机械负荷的影响.
- 确定运动皮质是否在将自愿命令与脊柱模式生成器集成中发挥作用.
主要方法:
- 在移动过程中操纵前肢质量在不受约束的小鼠中.
- 评估电机输出和皮质动力学.
- 扰乱小脑,以评估其对负载诱导的皮质转移的影响.
主要成果:
- 改变肢体负荷导致皮质动态发生显著变化,独立于运动皮质的不活化.
- 这些皮层动态变化在很大程度上不受小脑扰动的影响.
- 负载诱导的皮质反应大大大大大于脊柱运动神经元中观察到的.
结论:
- 运动皮质在移动过程中表现出机械负荷的潜伏表现.
- 这种潜在的皮层表现可能对于将自愿运动与正在进行的脊柱节律集成至关重要.
- 这些发现突出了皮质和脊髓电路在运动控制中的复杂相互作用.
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