前额前部电机电路启动持续的运动.
Yihan Wang1,2, Qian-Quan Sun3,4,5
1Graduate Neuroscience Program, University of Wyoming, Laramie, WY, 82071, USA.
Nature communications
|June 19, 2024
概括
背部中间前额叶皮层 (dmPFC) 运动皮层投射 (MP) 神经元通过编码上下文线索来启动持久运动. 禁用这些神经元会损害运动启动,揭示了一个关键的神经机制.
科学领域:
- 神经科学是一个神经科学.
- 动物行为 动物行为
- 计算神经科学是一种神经科学.
背景情况:
- 持续的运动对于动物的生存和适应至关重要.
- 启动持久性行为背后的神经机制仍然不太清楚.
- 识别选择信息指导持久行为的大脑区域是必不可少的.
研究的目的:
- 研究背部中部前额叶皮层 (dmPFC) 运动皮层发射 (MP) 神经元在启动持久运动中的作用.
- 为了确定dmPFC MP神经元是否在动作启动过程中编码上下文信息或自然价值.
- 阐明持续运动启动的神经电路和计算基础.
主要方法:
- 在清醒的小鼠中,单单单元细胞外记录.
- 光标记用于识别特定的神经元群体.
- 对dmPFC MP神经元的非激活.
- 感官刺激输入的计算建模.
主要成果:
- 确定了一个dmPFC MP神经元的特定群体是启动持久运动的.
- 这些神经元选择性地编码上下文信息,而不是自然价值.
- dmPFC MP神经元的非激活导致运动启动受损,下游区域 (岛屿和运动皮层) 的活动减少.
- 不需要dmPFC MP神经元来维持持续的持续运动.
结论:
- dmPFC MP神经元在启动,但不维持持久运动方面发挥着至关重要的作用.
- 由dmPFC MP神经元进行的上下文信息处理驱动了行动启动.
- 连续的感官刺激作为dmPFC MP神经元的输入信号来启动持久的行为,揭示了一个新的神经启动机制.
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