Stewart H, Noble G, Seeger B R
Aust Occup Ther J. 1992 Mar;39(1):33-9. doi: 10.1111/j.1440-1630.1992.tb01733.x.
This research was undertaken to determine the best wheelchair driving method for clients with cerebral palsy who were experiencing difficulties using displacement joysticks. The hypothesis was that adolescents with cerebral palsy would perform better in a tracking task using an isometric joystick (which has no moving parts) than a displacement joystick of the type used in commercial wheelchair controllers. A series of single subject case studies was performed in which the activating force of the isometric joystick was individualised for each subject. Comparative evaluation of the isometric joystick and a displacement joystick was then carried out. Results indicate that performance using the displacement joystick was superior to performance with the isometric joystick for the able-bodied subject and four of the five subjects with cerebral palsy. One of the subjects showed significantly better performance on the displacement joystick using his hand, and no significant difference between joysticks using his foot. The remaining subject, who used his foot, showed no significant difference between joysticks. These findings suggest that subjects with cerebral palsy with prior experience using a displacement joystick do not appear to benefit by the use of an isometric joystick compared to a displacement joystick. No difference in the use of the two joysticks was found for subjects with cerebral palsy who had no prior experience using a joystick. This suggests that an isometric joystick is an option for people beginning to learn to drive an electric wheelchair.
本研究旨在为使用位移操纵杆存在困难的脑瘫患者确定最佳的轮椅驾驶方法。假设是，患有脑瘫的青少年在使用等距操纵杆（无活动部件）进行跟踪任务时的表现会优于商用轮椅控制器中使用的位移操纵杆。进行了一系列单受试者案例研究，其中为每个受试者个性化设置了等距操纵杆的激活力。然后对等距操纵杆和位移操纵杆进行了比较评估。结果表明，对于健全受试者以及五名脑瘫受试者中的四名，使用位移操纵杆的表现优于使用等距操纵杆的表现。其中一名受试者用手操作时在位移操纵杆上表现明显更好，用脚操作时两种操纵杆之间无显著差异。其余用脚操作的受试者，两种操纵杆之间无显著差异。这些发现表明，与位移操纵杆相比，有使用位移操纵杆经验的脑瘫受试者使用等距操纵杆似乎并无益处。对于没有使用操纵杆经验的脑瘫受试者，未发现两种操纵杆的使用存在差异。这表明等距操纵杆是刚开始学习驾驶电动轮椅的人的一种选择。
