Whilst autistic individuals develop new internal action models during sensorimotor learning, the acquired movements are executed less accurately and with greater variability. Such movement profiles are related to differences in sensorimotor integration and/or altered feedforward/feedback sensorimotor control. We investigated the processes underlying sensorimotor learning in autism by quantifying accuracy and variability, relative timing, and feedforward and feedback control. Although autistic individuals demonstrated significant sensorimotor learning across trials, which was facilitated by processing knowledge‐of‐results feedback, motor execution was less accurate than non‐autistic individuals. Kinematic analysis indicated that autistic individuals showed significantly greater spatial variability at peak acceleration, but comparable spatial variability at peak velocity. These kinematic markers suggest that autistic movement profiles are driven by specific differences in sensorimotor control processes (i.e., internal action models) associated with planning and regulating the forces required to execute the movement. The reduction of variability at peak velocity indicates intact early feedback‐based sensorimotor control in autism. Understanding how feedforward and feedback‐based control processes operate provides an opportunity to explore how these control processes influence the acquisition of socio‐motor actions in autism. Autism Res 2020, 13: 423–435. © 2019 International Society for Autism Research, Wiley Periodicals, Inc.

中文翻译：

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步履蹒跚：自闭症谱系障碍的感觉运动学习过程中计划和前馈控制的特殊性。

自闭症个体在感觉运动学习过程中会开发新的内部动作模型，而获得的动作执行得不太准确，并且变异性更大。这样的运动曲线与感觉运动积分和/或改变的前馈/反馈感觉运动控制有关。我们通过量化准确性和可变性，相对时机以及前馈和反馈控制来研究自闭症中感觉运动学习的基础过程。尽管自闭症个体在整个试验中均表现出显着的感觉运动学习能力，这通过处理结果知识反馈得以促进，但是运动执行的准确性低于非自闭症个体。运动学分析表明，自闭症个体在峰值加速度时表现出明显更大的空间变异性，但在峰值速度时具有可比的空间变异性。这些运动学标志表明，自闭症的运动特征是由感觉运动控制过程（即内部动作模型）中与计划和调节执行运动所需的力相关的特定差异所驱动的。峰值速度变异性的降低表明自闭症中完整的基于早期反馈的感觉运动控制。了解前馈和基于反馈的控制过程如何运作，为探索这些控制过程如何影响自闭症中社会运动行为的获得提供了机会。内部动作模型）与计划和调节执行动作所需的力量有关。峰值速度变异性的降低表明自闭症中完整的基于早期反馈的感觉运动控制。了解前馈和基于反馈的控制过程如何运行，为探索这些控制过程如何影响自闭症中社会运动行为的获得提供了机会。内部动作模型）与计划和调节执行动作所需的力量有关。峰值速度变异性的降低表明自闭症中完整的基于早期反馈的感觉运动控制。了解前馈和基于反馈的控制过程如何运作，为探索这些控制过程如何影响自闭症中社会运动行为的获得提供了机会。Autism Res 2020，13：423-435。©2019国际自闭症研究会，Wiley Periodicals，Inc.