電腦滑鼠斜面對前臂肌肉之影響

The effect on forearm muscle activity in using different slanted computer mice

梁浚堂(Chun-Tong Leung)

指導教授 ： 陳漢明

國立臺灣大學/工學院/機械工程學研究所/碩士(2006年)

https://doi.org/10.6342/NTU.2006.00032

摘要

國外有不少的文獻、論文針對使用新型滑鼠和傳統滑鼠的肌肉負荷作比較，以探討使用人體工學滑鼠對肌肉負荷的改善。但鮮少文獻以造型特徵對滑鼠的外形作比較與探討。故此我們針對滑鼠外形的斜面型特徵作出探討，從而找出符合人體工學的滑鼠外形特徵，使人們在使用滑鼠時可以降低肌肉負荷以減少慢性疾病的出現。
在本研究中，我們將探討滑鼠外型的其中一個造型特徵--斜面角度。市面大部分滑鼠都是針對右手使用者設計而成，而且大都具有一個斜面、該斜面會讓使用者的前臂翻轉固定角度。本文針對不同滑鼠斜面角度在相同的使用時間及工作項目下，利用表面肌電儀(Surface Electromyography,sEMG)量測使用者操作不同斜面角度(0度、10度、20度、25度、30度斜面)滑鼠時手部肌肉(尺側伸腕肌、伸指肌、旋前圓肌和斜方肌)的負荷，並以定性及定量的分析方法，探討所量得的資料，從而選出最佳的斜面角度。
研究結果顯示，滑鼠斜面能有效減少前臂肌肉(尺側伸腕肌和旋前圓肌)的負荷，但因斜面而引起之滑鼠高度會引起手腕伸展，增加伸指肌的負擔。使用設計良好的滑鼠可以減少肌肉負荷，進而減低上肢肌肉不適的機率。

關鍵字

人體工學滑鼠 ； 肌電訊號 ； 斜面特徵 ； 肌肉骨骼不適

並列摘要

Computer mouse is one of the most general input devices during the usage of the personal computer. There are many literatures aimed on investigating the relationship in muscular activity between the usage of the traditional and ergonomic computer mouse but rarely reported the effect on muscular activity by using similar ergonomic mouse. This study was aim at the investigation on the relationship between forearm muscular activity and ergonomic mice, which have same mouse shape but only different slanted surface.
In this research twelve subjects were participated and performed the same text-editing task with different slanted mice. The muscle activity of the Right extensor carpi ulnaris (ECU), right extensor digitorum communis (ED), right pronation teres (PT) and right upper trapezius (Trap) were recorded by the surface electromyography and compared by the non-parametric statistic test.
The result in this study had revealed that under repetitive, long duration and low strength text editing task, the EMG levels were affect by the shape of computer mouse. A lower EMG level was found in terms of ECU and PT muscles by using the 25-degree slanted mouse. However, the advantage of slanted surface was accompanied with more wrist extension cause by the height of slanted feature and result in higher muscle load in terms of the ED muscle. Work with more neutral hand position give a decreased in muscle activity and might reduce the occurrence of occupational upper-limb disorder.

並列關鍵字

Ergonomic Mouse ； EMG ； Slanted Surface ； Musculoskeletal disorder

參考文獻

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