ACADSTAFF UGM
| Title | : | Effect of Wrist Extension Angles and Low-Velocity Ulnar Deviation Movements on Forearm Muscle Activity |
| Author | : |
Ir. Ardiyanto, S.T., M.Sc., Ph.D., AEP., IPM (1) Ir. Subagyo, Ph.D., IPU., ASEAN Eng. (2) Dr. Eng. Ir. Herianto, S.T., M.Eng., IPU., ASEAN Eng. (3) |
| Date | : | 0 2018 |
| Keyword | : | wrist, extension, ulnar deviation, movement, muscle activity wrist, extension, ulnar deviation, movement, muscle activity |
| Abstract | : | This study is conducted to examine the effect of wrist postures on the forearm muscle activity while performed low-velocity ulnar deviation movements. Eighteen healthy males participated in this study. The participants were asked to simulate several wrist angles representing the postures of computer input devices operations. The wrist angles were constructed from three levels of wrist extension angles (0 deg, 25 deg, and 50 deg) and three levels of wrist ulnar deviation movement angles (10 deg, 20 deg, and 30 deg). The angular velocity of the ulnar deviation movement was 10 deg /s. In guiding the wrist movement on the desired angles, vertical and horizontal goniometers and metronome were utilized. The muscle activity was recorded using electromyography from two muscles in the forearm region: extensor digitorum and extensor carpi ulnaris. As the results, there was a significant effect of the wrist extension angles on the muscle activity of extensor digitorum as well as static muscle activity of extensor carpi ulnaris. Mean comparison of the muscle activity showed that each extension angles has statistically different level of muscle activity. The lowest muscle activity was found on 0 deg wrist extension angles, while the highest muscle activity was found on 50 deg wrist extension angles. On the other hand, significant differences in the muscle activity due to the effect of ulnar deviation movement angles only occurred for 30 deg ulnar deviation movement angles. The results of this study might be important as a consideration in the design process of computer-input devices. |
| Group of Knowledge | : | |
| Level | : | Internasional |
| Status | : |
Published
|