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用扭曲的方式抓住:将行动目标与人类前端对面电路中的运动动作分离
Guy Rens1,2,3, Teresa D Figley4, Jason P Gallivan5
1Department of Psychology, University of Western Ontario, London, Ontario N6A 5C2, Canada grens@uwo.ca.
概括
抓住一个对象进行操纵,与简单的抓住不同,涉及不同的大脑活动模式. 先进的神经成像显示,计划复杂的行动比以前认为的更早地招募视觉和感觉运动区域.
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:
- 抓住 (抓住) 往往是对物体操纵的一步,而不是最终目标.
- 之前的功能性MRI (fMRI) 研究经常将手握作为手对象相互作用的终点.
- 了解操纵的神经基础,不仅仅是简单的把握,对于理解复杂的运动行为至关重要.
研究的目的:
- 通过使用fMRI来研究孤立的捕捉和对象操纵的捕捉之间的神经激活差异.
- 为了确定大脑激活模式是否能区分这两种类型的行为.
- 在捕捉和操纵过程中探索神经模式的时间动态.
主要方法:
- 与缓慢事件相关的fMRI在16名参与者中使用.
- 参与者进行了单独的握手 (抓住表盘) 或操纵的握手 (抓住和转动表盘).
- 代表性相似性分析 (RSA) 和时间多维素模式分析 (tMVPA) 用于分析大脑激活模式.
主要成果:
- 截然不同的神经激活模式区分了孤立的捕捉与操纵的捕捉.
- 这些差异可以在早期视觉皮层,尾部内突 (cIPS) 和上顶叶 (SPL) 中观察到.
- 对象操纵招募大脑区域超出典型的抓取网络,包括SPL和早期视觉皮层.
结论:
- 对象操纵涉及比以前理解的更广泛的大脑区域网络,延伸到视觉和更高阶的感觉运动区域.
- 与计划操纵相关的神经模式很早就出现了,并且类似于执行过程中的神经模式.
- 这些发现突出了大脑对目标指向行动的对象状态和运动指令的复杂编码.
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