Packaging accessibility is a significant problem for many older people. Whilst the majority of studies have focused on issues surrounding strength, work has shown that dexterity required to open a pack is also a major issue for many older people.\ud\udHence, the work undertaken here, reports a quantitative study that aimed to analyse motion coordination patterns across digits 2–5 (index to little finger) during interactions with three of the most common types of packaging: plastic bottles, jars, and crisps packets, and comparing those interactions to a common measure of dexterity, the Perdue Pegboard. Ten subjects (6 males and 4 females) were examined while reaching\udforward to grasp and open a 300ml plastic bottle and a 500g jar. A ten-camera opto-electronic motion capture system measured trajectories of 25 miniature reflective\udmarkers placed on the dorsal surface landmarks of the hand. Joint angular profiles for 12 involved flexion–extension movements were derived from the measured coordinates of\udsurface markers.\ud\udThe results showed that finger correlations vary widely across the differing pack formats with the crisps having the lowest finger movement correlation and the jar having the highest. Speed and jerk metrics were also seen to vary across the various pack formats.\ud\udHowever, finger correlations were seen to be more relevant to perceived dexterity of pack opening than finger speeds and jerk motions.
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机译：对于许多老年人而言，包装的可及性是一个重大问题。尽管大多数研究都集中在围绕力量的问题上，但研究表明，打开包装袋所需要的敏捷性也是许多老年人的主要问题。\ ud \ udHence在此进行的一项研究报告了旨在分析的定量研究与三种最常见的包装类型（塑料瓶，广口瓶和薯片包装）进行交互时，跨数字2–5（小指的食指）的运动协调模式，并将这些交互作用与常用的灵活性度量标准Perdue Pegboard进行比较。检查十名受试者（6名男性和4名女性），同时伸手抓住并打开300ml塑料瓶和500g广口瓶。十个摄像头的光电运动捕获系统可测量放置在手背表面界标上的25个微型反射\ udmarks的轨迹。从\ udsurface标记的测量坐标得出了12种涉及屈伸运动的关节角度轮廓。\ ud \ ud结果表明，手指相关性在不同包装形式下差异很大，其中薯片的手指移动相关性最低，而罐子的手指移动相关性最低。最高的。速度和抽动指标在各种包装形式中也有所不同。\ ud \ ud但是，手指的相关性与感知的包装打开灵巧性比手指的速度和抽动动作更为相关。
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