Dennerlein Jack T, Johnson Peter W
Department of Environmental Health, Harvard School of Public Health, Boston, MA, USA.
Ergonomics. 2006 Nov 15;49(14):1456-69. doi: 10.1080/00140130600811620.
In order to determine differences in biomechanical risk factors across different mouse positions within computer workstations a repeated measures laboratory study was completed with 30 adults (15 females 15 males). The subjects performed mouse-intensive tasks during two experiments. One experiment examined three mouse positions: a standard mouse (SM) position with the mouse directly to the right of the keyboard; a central mouse (CM) position with the mouse between the keyboard and the body, positioned in the body's mid-sagittal plane; a high mouse (HM) position, which simulated using a keyboard drawer with the mouse on the primary work surface. The second experiment compared two mouse positions: the SM position and a more central position using a keyboard without a number keypad (NM). Electrogoniometers and inclinometers measured wrist and upper arm postures and surface electromyography measured muscle activity of four forearm muscles and three shoulder muscles. The CM mouse position was found to produce the most neutral upper extremity posture across all measures. The HM position produced the least neutral posture and resulted in the highest level of muscle activity. Compared to the SM position, the NM position reduced wrist extension slightly and promoted a more neutral shoulder posture. Little difference in muscle activity was observed between the SM and NM positions. In conclusion, of these alternative mouse positions, the HM position was the least desirable, whereas the CM position reduced overall awkward postures associated with mouse-intensive computer tasks.
为了确定计算机工作站内不同鼠标位置的生物力学风险因素差异，对30名成年人（15名女性，15名男性）进行了一项重复测量实验室研究。受试者在两项实验中执行了高强度鼠标操作任务。一项实验考察了三种鼠标位置：标准鼠标（SM）位置，鼠标直接位于键盘右侧；中央鼠标（CM）位置，鼠标位于键盘和身体之间，处于身体矢状面中部；高鼠标（HM）位置，模拟使用带键盘抽屉且鼠标位于主工作面上的情况。第二项实验比较了两种鼠标位置：SM位置和使用无数字小键盘键盘的更中央位置（NM）。电子测角仪和倾角仪测量手腕和上臂姿势，表面肌电图测量四块前臂肌肉和三块肩部肌肉的肌肉活动。结果发现，CM鼠标位置在所有测量指标中产生的上肢姿势最为中立。HM位置产生的中立姿势最少，肌肉活动水平最高。与SM位置相比，NM位置略微减少了手腕伸展，并促进了更中立的肩部姿势。SM和NM位置之间观察到的肌肉活动差异很小。总之，在这些替代鼠标位置中，HM位置最不理想，而CM位置减少了与高强度鼠标操作计算机任务相关的整体别扭姿势。
