- 學位論文
以肌電圖評估長期滑鼠使用人員上肢人因工程問題及改善
Using EMG to Evaluate Ergonomic Problems of the Upper-extremity among the Long-time Mouse Use
摘要
隨著視窗化軟體的發展，電腦的操作不再只是以鍵盤文字輸入方式，多改由滑鼠來點選與執行，而以圖像來呈現。本研究之目的為利用表面肌電圖，並配合肌肉不適自我評估量表，共同評估持續性使用電腦滑鼠之手部肌肉疲勞的情形。本研究共募集60位過去一年無上肢肌肉骨骼相關病史之自願受試者，給予連續使用滑鼠操作電腦遊戲2小時，利用表面肌電圖監測受試者右手伸食指肌、前臂尺側屈腕肌、上臂中三角肌與上斜方肌之肌肉疲勞情形，並利用自我評估量表讓受試者於電腦遊戲開始前與實驗結束後評估上肢肌肉不適情形。實驗結果發現經過連續兩小時滑鼠操作之後，肌電圖量測肌肉結果發現四條肌肉中位頻率皆呈現下降趨勢，且均在實驗第30分鐘即出現明顯肌肉疲勞情形。在下降之幅度上，男性總平均下降75.93Hz，而女性下降72.26Hz，尤以尺側屈腕肌及上斜方肌之下降幅度最多。另外，自我評估量表結果顯示，上肢各部位疲勞程度皆有顯著增加的趨勢，肩部不適以女性受試者比例最高（80％），而在手腕及手部（手掌及手指）不適之盛行率，不論女性及男性受試者其比例皆亦偏高。因此，電腦操作者從事長時間連續滑鼠操作使用，容易造成肌肉疲勞。
並列摘要
The computer mouse is present in virtually every office environment now because of the recent adoption of the graphical user interface. The main objectives of this study were to observe the alternations of muscle fatigue resulting from the influence of continuous computer mouse using and to evaluate the applicability of surface electromyography (EMG) in characterizing low-force dynamics contractions. There were 60 subjects recruited who didn’t have musculoskeletal disorders of upper extremity in the past year. EMG was used to monitor the activities of extensor indicis proprius, flexor carpi ulnaris, middle deltoid and upper trapezius during the computer game playing. At the beginning, the end of playing game, respectively, subjects were asked to assess the upper-extremity muscles fatigue by a self-report questionnaire. The findings of study showed that all target muscles presented significant muscle fatigue by EMG measurement after two hours computer mouse use, especially for the flexor carpi ulnaris and upper trapezius. It was also found that the extent of self-report fatigue of all parts of upper-extremity increased. Finally, the workers would reach muscle fatigue in a daily work and computer mouse use increased risk of developing musculoskeletal disorders.