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状皮层中的动态空间编码介导着触觉-运动转换
Janina Klautke1, Celia Foster2,3, W Pieter Medendorp4
1Biological Psychology and Neuropsychology, University of Hamburg, Hamburg, Germany.
Nature communications
|July 27, 2023
概括
后顶层皮质 (PPC) 灵活地更新触摸的空间代码. 它整合了触觉位置和身体姿势来规划运动,这对于身体意识和互动至关重要.
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
- 人类运动控制人体运动控制
背景情况:
- 触摸运动涉及整合触觉和自身感知信息.
- 后壁皮质 (PPC) 涉及触觉处理和运动规划.
- 在PPC中,触觉感知和运动控制之间的精确相互作用仍然不清楚.
研究的目的:
- 为了研究后额叶皮质 (PPC) 如何表示触觉信息和运动目标.
- 了解底层的神经机制转化感官输入到目标导向的运动.
- 阐明PPC在整合身体自我意识的解剖学和空间参考框架中的作用.
主要方法:
- 功能磁共振成像 (fMRI) 用于记录人类参与者的大脑活动.
- 多声元模式分析 (MVPA) 应用于fMRI数据来解码神经表征.
- 参与者在不同的空间和解剖结构中执行了涉及脚触觉刺激的任务,需要感官区分和运动反应.
主要成果:
- 在感官处理过程中,触觉位置在前PPC中被解剖编码,在后PPC中被空间编码.
- 在运动指令之后,PPC转移到仅仅以空间坐标表示运动目标.
- 在PPC中观察到神经编码在感觉,基于规则和运动信息方面存在显著的重叠.
结论:
- 根据任务需求,PPC在更新其空间表示方面表现出了显著的灵活性.
- 这种神经灵活性可以将感官信息转化为适当的运动指令,以便与环境和自己的身体相互作用.
- 这些发现凸显了PPC在传感运动整合和身体表现方面的关键作用.
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