鼠标的感觉运动皮层在触及和抓取时反映复杂的动力学细节

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Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans

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Harrison A Grier¹, Sohrab Salimian¹, Matthew T Kaufman^2,3,4

¹Graduate Program in Computational Neuroscience, The University of Chicago, Chicago, United States.

eLife

|February 9, 2026

概括

研究人员研究了老鼠大脑如何控制前肢运动,例如伸手和抓住. 主要运动皮层 (M1-fl) 和体感官皮层 (S1-fl) 都编码了关节角度,但在特定目标信息的时间上有所不同.

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
感官运动皮质感官运动皮质

背景情况:

协调前肢运动涉及复杂的运动指令,从抽象的目标到精确的肌肉动作.
感觉运动皮质对于运动控制至关重要,但其子区域 (特别是小鼠) 中详细指令信号的分布尚未完全理解.
目前尚不清楚小鼠的初级运动皮层 (M1) 和体感官皮层 (S1) 是否与高级运动方向信号一起编码低级关节角度细节.

研究的目的:

研究小鼠前肢主要运动皮质 (M1-fl) 和前肢体感官皮质 (S1-fl) 中运动相关活动的表现,在达到-抓取任务期间.
要确定M1-fl和S1-fl是否编码低级联接角度信息和高级目标特定信号.
阐明M1-fl和S1-fl对前肢运动控制的不同和共同贡献.

主要方法:

使用高质量的无标记追踪和两光子成像,在小鼠中执行到达-抓取任务.
在M1-fl和S1-fl中量化了与运动相关的神经活动.
应用线性解码模型来分析联合角度的表示和特定目标信息.

主要成果:

无论是M1-fl还是S1-fl,都表现出近距离和远距离关节角度的强大和可比编码.
M1-fl显示早期发病和持续编码的目标特定信号.
在运动开始时,S1-fl表现出针对特定目标信息的短暂调制,与M1-fl.不同.

结论:

鼠标M1-fl和S1-fl共享低水平关节角度细节的编码,用于前肢控制.
编码高层次目标信息的独特时间动态表明M1-fl和S1-fl的独特角色.
这些发现表明,对小鼠前肢控制的皮质电路比以前假设的更加分布.

关键词:

编码编码编码编码关节的角度关节的角度这里是鼠标鼠标鼠标鼠标鼠标鼠标.神经科学神经科学主要运动皮层 (Primary Motor Cortex) 是一个主要的运动皮层.主要的体感皮层 (somatosensory cortex) 是一个主要的体感皮层.传感器运动系统传感器运动系统采用双光子成像技术进行两光子成像.

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