选择性激活体下核输出量化尺度运动运动
Alexander D Friedman1, Henry H Yin2,3
1Department of Psychology and Neuroscience, Duke University, Durham, North Carolina 27708.
概括
脑下核 (STN) 的深度大脑刺激 (DBS) 可能不会像想象的那样抑制运动. 对STN神经元的光遗传刺激表明,它们通过脑干投射精确控制行动参数.
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
- 深度大脑刺激 深度大脑刺激
背景情况:
- 脑下核 (STN) 是帕金森病中深度大脑刺激 (DBS) 的关键目标.
- 目前的模型表明,STN DBS通过增强抑制性基底腺节输出来抑制运动.
- 以前的研究方法无法选择性地准STN输出神经元.
研究的目的:
- 研究STN输出神经元在运动控制中的精确作用.
- 用选择性刺激技术阐明STN DBS背后的机制.
- 挑战运动抑制中STN功能的主导模式.
主要方法:
- 在小鼠中选择性光遗传刺激STN投射神经元.
- 使用3D运动捕获量化行为反应.
- 分析STN神经元发射率及其与刺激参数的关系.
主要成果:
- STN刺激诱导了快速的,依赖频率的运动.
- 单边刺激引起了反向运动和头部运动 (yaw, roll, pitch).
- 双边刺激使头部在不转动的情况下升高,STN投射刺激模仿了这些效应.
结论:
- 质疑STN在运动抑制中的作用.
- 通过直接的大脑干投影,STN输出可以精确地指定行动参数.
- 光遗传刺激提供了一种新的方法来研究STN功能 in vivo.
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