Comparison of Muscle Activity and Input Performance of Operators Using a Computer Mouse and a Trackball

• 발행기관: 한국전문물리치료학회
• 저자명: Hwan-suk Yoo Chung-hwi Yi Oh-yun Kwon Hye-seon Jeon Won-gyu Yoo
• 간행물 정보: 『한국전문물리치료학회지』한국전문물리치료학회지 제16권 제4호, 37~43쪽, 전체 7쪽
• 주제분류: 의약학 > 의학일반
• 파일형태: PDF
• 발행일자: 2009.10.30

영문 초록

This study compared the electromyographic activities and input performance of computer operators using a computer mouse and a trackball. Muscle activities were assessed at the upper trapezius (UT), middle deltoid (MD), extensor digitorum (ED), and first dorsal interosseous muscle (FDI). Twenty-six healthy subjects were recruited, and the test order was selected randomly for each subject. The task set was to click moving targets on a Windows program. The EMG amplitude was normalized using the percentage of reference voluntary contraction for UT and MD and the percentage of maximal voluntary contraction for ED and FDI. To analyze the differences in EMG activity, a paired t-test was used. UT muscle activities were significantly greater when the computer mouse was used (p<.05). FDI muscle activities were significantly greater when the trackball was used (p<.05). Using a trackball can reduce the load on the UT during computer work and help to prevent and manage work-related musculoskeletal disorders.

키워드

Computer mouse Trackball Work-related musculoskeletal disorders