抑制小脑间位核中的胆能信号会损害运动行为
Jasmine Pickford1, Cristiana I Iosif1, Zafar I Bashir1
1School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol, UK.
小脑中的乙胆对于自愿运动协调和执行至关重要,主要是通过肌肉类受体,特别是在基于奖励的行为中. 这项研究使用大鼠的受体对抗剂调查了它的作用.
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
- 行为药理学行为药理学
背景情况:
- 神经调节剂,特别是胆固醇系统在小脑中的确切作用仍然不太清楚.
- 小脑胆能信号的行为意义在很大程度上是未知的,这阻碍了我们对运动控制机制的理解.
研究的目的:
- 调查小脑胆能信号在行为中的重要性.
- 阐明肌肉酸和尼古丁酸乙胆受体在小脑功能和运动行为中的特定作用.
主要方法:
- 双边输注乙胆受体对抗剂 (斯科波胺和麦卡米胺) 进入老鼠小脑 (插座核).
- 使用一系列行为测试来评估运动效应,包括开放场地探索,水平梯子行走,梁行走和颗粒达到任务.
- 评价奖励相关行为通过颗粒消费在一个自由获取食物任务.
主要成果:
- 联合抗剂降低了自发运动,在行走任务中受损协调,降低了达到,减缓了目标导向的达到,降低了食物消耗.
- 单独的scopolamine会导致运动缺陷和减少食物摄入量,而单独的mecamylamine主要影响光束行走时间.
- 特定任务的运动学习没有受到影响,这表明它在运动执行和协调中发挥了作用,而不是学习.
结论:
- 小脑间位核中的乙胆对于执行和协调自愿运动至关重要.
- 肌肉受体信号在调解这些效应中起着主要作用,特别是在与奖励相关的行为中.
- 这些发现凸显了小脑胆能系统在运动控制和动机行为中的重要性.
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