Abstract
Finger joint angles while using a scroll wheel were monitored by two types of scrolling motions (scroll up and scroll down), using a high-speed motion analysis microscope. The finger joint angles were separately analyzed with two phases (wheel rotating phase and rewinding phase) during scrolling. Based on the changes in finger joint angles for 14 participants, it was revealed that MP joint angles during scroll up motions were 4.3% more over-extended than those during scroll down motions. Such overextensions were observed when they perform scroll up motion especially in rewinding phases to prepare for the next wheel rotating phases. Subjective discomfort level in scroll up motion was significantly higher than that in scroll down motion. Observed overextension during rewinding phase in scroll up motion may be the potential factor for the subjective discomfort. It was expected that changes in the location and size of scroll wheels may reduce the overextension and discomfort levels.
Published Version
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