Cognitive Neurophysiology, Department of Child and Adolescent Psychiatry, Faculty of Medicine, TU Dresden, Fetscherstrasse 74, 01307, Dresden, Germany.
University Neuropsychology Centre, Faculty of Medicine, TU Dresden, Dresden, Germany.
Sci Rep. 2023 Apr 3;13(1):5379. doi: 10.1038/s41598-023-32508-5.
It seems natural that motor responses unfold smoothly and that we are able to easily concatenate different components of movements to achieve goal-directed actions. Theoretical frameworks suggest that different motor features have to be bound to each other to achieve a coherent action. Yet, the nature of the "glue" (i.e., bindings) between elements constituting a motor sequence and enabling a smooth unfolding of motor acts is not well understood. We examined in how far motor feature bindings are affected by reward magnitude or the effects of an unsigned surprise signal. We show that the consistency of action file binding strength is modulated by unsigned surprise, but not by reward magnitude. On a conceptual and theoretical level, the results provide links between frameworks, which have until now not been brought into connection. In particular, theoretical accounts stating that only the unexpectedness (surprisingness) is essential for action control are connected to meta-control accounts of human action control.
运动反应似乎是自然而然地展开的，我们能够轻松地将运动的不同组成部分连接起来，以实现目标导向的动作。理论框架表明，为了实现连贯的动作，不同的运动特征必须相互结合。然而，构成运动序列的元素之间的“黏合剂”（即绑定）的性质，以及使运动行为顺利展开的机制尚不清楚。我们研究了运动特征的绑定在多大程度上受到奖励幅度或无符号惊喜信号的影响。结果表明，动作文件绑定强度的一致性受到无符号惊喜的调节，但不受奖励幅度的调节。在概念和理论层面上，这些结果将迄今为止没有联系起来的框架联系起来。特别是，理论上认为只有意外性（惊喜）对于动作控制是至关重要的观点，与人类动作控制的元控制理论联系起来。
