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KMID : 1137820130340020055
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의공학회지
2013 Volume.34 No. 2 p.55 ~ p.62
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The Motion Analysis of the limited Wrist Joint During Dart-Throwing Motion by Using Infrared Camera
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Park Chan-Soo
Park Jong-Il
Kim Kwang-Gi
Jang Ik-Gyu
Kim Tae-Yoon
Lee Sang-Lim
Baek Goo-Hyun
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Abstract
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Wrist joints consist of irregularly shaped carpal bones and other complicated structures. Thus, evaluating the motion of a wrist joint is a challenging task. In this study, we used an infrared camera to perform a kinematic analysis of a dart-throwing motion. We measured the difference between the movement of a normal wrist and constrained wrist (wrist with a wrist glove) in the dart-throwing motion with thirty six healthy participants. We measured the ulna flexion - radial extension motion using the attached passive marker and analyzed it using Polygon software and SPSS. The pitch and yaw motions with a glove was bigger than the ones without a glove by 20 and 15 degrees, respectively. On the other hand, the roll motion without a glove was bigger than the one with a glove by 7 degree. Wilcoxon signed rank test (p<0.05) confirmed that there are significant differences between the motion with and without a glove. It was found that the magnitude of the pitch and yaw motion with a constrained wrist joint toward radial extension in dart-throwing motion is smaller than the one with a normal wrist joint. However, a normal wrist joint showed a bigger movement in the roll direction.
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KEYWORD
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Wrist joint, Dart -throwing motion, Infrared camera
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