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在多指触摸任务期间人类运动和体感区域之间的功能连接:一个概念验证研究

Roberto García-Leal1,2,3, Julio Prieto-Montalvo3,4,5, Juan Guzman de Villoria3,5,6

  • 1Ph.D. Program in Neuroscience, Universidad Autónoma de Madrid-Cajal Institute, 28029 Madrid, Spain.

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概括

参与手表达的大脑区域在手指敲击时显示动态信息流. 这种可塑性支持快速学习,而3a区域可能保持代表性灵活性.

关键词:
区域3a 区域3a是一个区域.功能磁力共振成像 (fMRI) 是一种信息不平衡获得因果关系.运动皮层的运动皮层.人体感官皮层 (somatosensory cortex) 是一个感官皮层.敲击任务任务的任务

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科学领域:

  • 神经科学是一个神经科学.
  • 认知神经科学 认知神经科学
  • 发动机控制器的控制器

背景情况:

  • 灵长类动物初级运动 (M1) 和体感官 (SI) 皮层中的手表达图是可塑的,可以通过训练进行修改.
  • 在点击任务期间,这些区域的激活和地图扩展已知,但信息流的方向性尚不清楚.

研究的目的:

  • 为了研究指纹敲击期间在M1 (区域4),SI (后中心) 和区域3a (中央骨的底部) 之间BOLD活动流动的方向性和时间动态.
  • 了解信息流如何随着任务参与和非任务期间的变化而变化.

主要方法:

  • 应用信息失衡增益因果关系 (IIG) 分析到fMRI数据.
  • 收集了来自九名参与者的两个半球的数据,他们交替地用右手和左手敲击手指.
  • 分析了区域4,区域3a和SI区域的BOLD活动.

主要成果:

  • 在敲击过程中,强大的信息流从前中心和后中心旋转向中央流.
  • 当没有点击时,gyri之间的双向通信较弱.
  • 在点击过程中,信息流绕过硫,有利于直接的中央后至中央前路径.
  • 在非任务期间,Postcentral to sulcus的影响增强,但在点击期间减少.

结论:

  • M1,Area 3a和SI形成了一个动态网络,对快速学习和处理至关重要.
  • 区域3a可能在复杂的运动任务 (如手指敲击) 中保持表达性可塑性.