Projection of the point of force application onto a palmar plane of the hand during wheelchair propulsion.
Projection of the point of force application onto a palmar plane of the hand during wheelchair propulsion.
复制标题
DOI：
10.1109/86.536768
复制
发表时间：
1996-09-01
期刊：
影响因子：
--
通讯作者：
Shimada, S D
中科院分区：
文献类型：
--
作者：
Cooper, R A;Robertson, R N;Shimada, S D
本研究的目的是开发和测试一种方法，用于将推缘施力点（PFA）投影到手掌平面模型上。重复使用轮椅往往会导致手和手腕疼痛或受伤。手抓住推缘的方式以及施加到推缘的力和力矩的方向可能导致疼痛和损伤的高发生率。PFA在手掌表面模型上的投影主要位于区域II内。这些结果与先前的研究一致，这些研究假设PFA与其中一个掌指关节（MP）一致。然而，从三个科目的结果显示不同的PFA模式内的手掌表面的手，这可能与每个科目的推进模式，PFA是不是集中在一个单一的MP联合。四手标记系统的世界坐标在手掌平面上的投影显示分辨率在3mm内，或者是无源反射标记直径的一半。平面模型假设中的误差对于第二和第五MP标记是最大的。这是预期的，因为随着手抓握的变化，这些标记不会保持共面。这项研究的结果表明，新的知识如何施加的手到pushrim可以使用这种方法。本技术说明提供了深入了解轮椅推进动力学的细节，并描述了一种估计手掌表面PFA的技术。本技术说明提供了三种不同轮椅使用者的初步结果。
The objective of this study was to develop and test a method for projecting the pushrim point of force application (PFA) onto a palmar plane model of the hand. Repetitive wheelchair use often leads to hand and wrist pain or injury. The manner by which the hands grasp the pushrim and how the forces and moments applied to the pushrim are directed may contribute to the high incidence of pain and injury. The projections of the PFA onto the palmar surface model of the hand reside primarily within zone II. These results are in agreement with previous studies which have assumed the PFA to be coincident with one of the metacarpophalangeal (MP) joints. However, the results from three subjects show different PFA patterns within the palmar surface of the hand which can be related to each subject's propulsion pattern, and the PFA is not focused at a single MP joint. Projection of the world coordinates of the four hand marker system onto the palmar plane show the resolution to be within 3 mm, or one half the diameter of the passive reflective markers. The errors in the planar model assumption were greatest for the second and fifth MP markers. This was expected because as the hand grasp changes these markers do not remain coplanar. The results of this study indicate that new knowledge about how forces are applied by the hand onto the pushrim can be obtained using this method. This technical note provides insight into understanding the details within the kinetics of wheelchair propulsion and describes a technique for estimation of the PFA on the palmar surface of the hand. This technical note provides initial results from three different wheelchair users.