Laboratoire Dynamique Du Langage, Université Lyon 2, Université de Lyon, Lyon, France.
Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France.
J Mot Behav. 2020;52(4):404-417. doi: 10.1080/00222895.2019.1643283. Epub 2019 Jul 24.
Motor control is classically described as relying on two components: anticipatory control (feedforward processing) and online control (feedback processing). Here we aimed to unveil the developmental steps of both feedback and feedforward control in 5-10 years old children, using a simple and ecological task. We manipulated object's weight in a reach-to-displace paradigm. When the weight was known before lifting it, anticipatory processes were quantifiable during the reaching phase. Conversely, an unknown weight triggered online corrections during the displacing phase. Movement kinematics revealed that children anticipate this objet property as young as 5 y-o. This anticipation becomes adequate around 7 y-o and is paralleled by poor online corrections. This simple yet relevant paradigm should allow quantifying deviations from neurotypical patterns in disorders of motor control.
预期控制（前馈处理）和在线控制（反馈处理）。在这里，我们旨在使用简单而生态的任务揭示 5-10 岁儿童的反馈和前馈控制的发展步骤。我们在伸手去移动物体的范式中操纵物体的重量。当举起物体之前知道它的重量时，可以在伸手阶段量化预期过程。相反，未知的重量会在移动阶段触发在线校正。运动动力学表明，儿童早在 5 岁时就已经预料到这个物体的属性。这种预期在 7 岁左右变得足够好，并伴随着在线校正能力差的情况。这种简单而相关的范式应该可以量化运动控制障碍中与神经典型模式的偏差。
