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条纹体在控制反应和自制行为期间等待中的作用
Qiang Zheng1,2, Yujing Liu1,2, Yue Huang1,2
1State Key Laboratory of Membrane Biology, School of Life Sciences, Peking University, Beijing 100871, China.
概括
感觉运动条纹体,而不是运动皮质,对于调节定时任务中的等待行为至关重要. 感觉运动条纹体的损伤增加了过早反应和减少了运动活力.
科学领域:
- 神经科学是一个神经科学.
- 行为神经科学 行为神经科学
- 认知神经科学 认知神经科学
背景情况:
- 在响应之前等待对于像反应时间任务这样的认知功能至关重要.
- 控制这种等待能力的特定大脑区域在很大程度上是未知的.
- 了解这些区域是解读抑制控制和时间的神经基础的关键.
研究的目的:
- 为了研究运动皮质 (MO) 和感觉运动背侧条纹体 (DLS) 在调节等待行为的作用.
- 确定这些区域的病变如何影响时间响应任务的性能.
- 阐明抑制控制和反应时间的基础的神经机制.
主要方法:
- 在雄性大鼠中利用局部激发性毒性病变.
- 在具有可变延迟的有条件杆释放任务中评估性能.
- 检查了任务的自动定时版本,需要在杆释放之前固定延迟.
- 在等待和响应阶段测量神经活动模式.
主要成果:
- 感觉运动脊侧条纹体 (DLS) 的双边病变显著增加了早反应.
- 双边运动皮层 (MO) 损伤主要导致反应时间延长.
- DLS病变导致响应时间向左移动,运动活力减弱,包括移动速度减慢.
- 在MO和DLS中,神经活动在任务执行过程中表现出类似的模式.
结论:
- 感觉运动条纹体在调节等待行为和在与时间相关的任务中抑制控制方面发挥着至关重要的作用.
- 运动皮层似乎更多地参与了响应的执行速度,而不是启动等待.
- 这些发现凸显了DLS和MO对复杂的时间和响应控制的独特贡献.
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