• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Ergonomics >Influence of arm and wrist support on forearm and back muscle activity in computer keyboard operation
【24h】

Influence of arm and wrist support on forearm and back muscle activity in computer keyboard operation

机译：手臂和手腕支撑对计算机键盘操作中前臂和背部肌肉活动的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effects of forearm and wrist supports on the upper extremity postures in computer keying tasks and associated EMG activity of arm and back muscles were examined (N = 8). Four positions were forearms unsupported (floating) and supported, wrists supported by bead packed (WR1) and gel-filled (WR2) wrist rest. The right and left elbow extensions were 65° and 68°, respectively, in unsupported forearms. Bilateral elbow extension increased with the forearm/wrist supports and mostly, the elbow was maintained at around 90° or greater. The wrist extension decreased with forearm/wrist supports over the unsupported condition. The forearm support significantly reduced the activity of forearm extensor digitorum, i.e., right (F{sub}(1,47) = 12.19, p<0.01) and left (F{sub}(1,47)= 5.38, p<0.05) and upper trapezius muscles over the floating posture. Wrist rests, however, increased load on the upper trapezius; the activities of flexor digitorum superficialis and erector spinae were close to the resting EMG activity for both forearm and/or wrist support. The type of wrist rests was a concern and this study indicated that the gel filled wrist rest was advantageous in reducing the forearm muscle load, in comparison to the bead packed cushions.
机译：检查前臂和腕部支撑对计算机键盘键入任务中上肢姿势的影响以及相关的手臂和背部肌肉的EMG活动（N = 8）。四个位置分别是前臂不受支撑（浮动）和支撑，手腕由珠子填充（WR1）和凝胶填充（WR2）腕托支撑。在无支撑的前臂中，右肘和左肘伸展分别为65°和68°。随着前臂/腕关节的支持，双侧肘关节的伸展增加，并且大部分情况下，肘部保持在90°左右或更大。在无支撑的情况下，前臂/腕部支撑使腕部伸展减少。前臂支撑明显降低了前臂指趾伸肌的活动，即右（F {sub}（1,47）= 12.19，p <0.01）和左（F {sub}（1,47）= 5.38，p <0.05 ）和上斜方肌上方的漂浮姿势。但是，腕部支撑着斜方肌上部的负荷增加;对于前臂和/或腕部支撑，指浅屈肌和竖脊肌的活动均接近静止的EMG活动。腕枕的类型是一个令人关注的问题，这项研究表明，与填充珠子的坐垫相比，凝胶填充的腕枕在减少前臂肌肉负荷方面具有优势。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号