A kinematic analysis of how young adults with and without autism plan and control goal-directed movements
A kinematic analysis of how young adults with and without autism plan and control goal-directed movements
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DOI：
10.1123/mcj.10.3.244
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发表时间：
2006-07-01
期刊：
影响因子：
1.1
通讯作者：
Lyons, James
中科院分区：
文献类型：
--
作者：
Glazebrook, Cheryl M.;Elliott, Digby;Lyons, James
我们研究了自闭症青少年目标定向瞄准运动的计划和控制。参与者对两个目标中的一个进行快速手动瞄准动作。我们通过改变目标的大小和运动的幅度来操纵规划和控制过程的难度。与之前的研究一致，自闭症参与者准备和执行动作所需的时间更长，特别是在难度指数较高的情况下。尽管在准确性方面没有组别差异，但自闭症参与者在运动的初始阶段表现出更多的时间和空间变异性，尽管平均峰值加速度和速度低于对照组参与者。我们的结果表明，尽管自闭症患者很难确定肌肉力量，但他们在肢体减速过程中补偿了这种初始的可变性。也许自闭症患者已经学会了保持较低的初始冲动，以最大限度地减少在运动的在线控制阶段需要纠正的空间变异性。
We examined the planning and control of goal-directed aiming movements in young adults with autism. Participants performed rapid manual aiming movements to one of two targets. We manipulated the difficulty of the planning and control process by varying both target size and amplitude of the movements. Consistent with previous research, participants with autism took longer to prepare and execute movements, particularly when the index of difficulty was high. Although there were no group differences for accuracy, participants with autism exhibited more temporal and spatial variability over the initial phase of the movement even though mean peak accelerations and velocities were lower than for control participants. Our results suggest that although persons with autism have difficulty specifying muscular force, they compensate for this initial variability during limb deceleration. Perhaps persons with autism have learned to keep initial impulses low to minimize the spatial variability that needs to be corrected for during the online control phase of the movement.