School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA.
J Mot Behav. 2022;54(6):706-718. doi: 10.1080/00222895.2022.2070122. Epub 2022 Apr 29.
Approaches to improve outcomes after upper-extremity amputation remain poorly understood. Examining prosthesis-use at different levels of loss elucidates motor control challenges. Non-amputated participants completed simple and complex reach-to-grasp actions using a body-powered transradial or partial-hand prosthesis simulator. We hypothesised that increased task complexity and participants using a partial-hand device would show greater functional adaptation compared to participants using a transradial device. Partial-hand users demonstrated variable grasp postures and higher reach peak velocities in the complex, but not simple, task. All groups showed decreases in movement duration in the complex task, but only partial-hand users improved in the simple task. These behavioural changes suggest how device level and task may influence prosthesis-use, with relevance to amputation rehabilitation.
在上肢截肢后改善结果的方法仍然知之甚少。检查不同丧失水平的假体使用情况可以阐明运动控制挑战。非截肢参与者使用身体供电的经桡骨或部分手假体模拟器完成简单和复杂的伸手抓握动作。我们假设，与使用经桡骨设备的参与者相比，增加任务复杂性和使用部分手设备的参与者将表现出更大的功能适应性。部分手使用者在复杂但非简单任务中表现出可变的抓握姿势和更高的到达峰值速度。所有组在复杂任务中运动持续时间都减少，但只有部分手使用者在简单任务中得到改善。这些行为变化表明设备级别和任务如何可能影响假体使用，与截肢康复有关。
