Load pattern and pressure pain threshold in the upper trapezius muscle and psychosocial factors in medical secretaries with and without shoulder/neck disorders
Load pattern and pressure pain threshold in the upper trapezius muscle and psychosocial factors in medical secretaries with and without shoulder/neck disorders
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DOI：
10.1007/s004200050170
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发表时间：
1997-06-01
影响因子：
3
通讯作者：
Astrom, A
中科院分区：
文献类型：
--
作者：
Hagg, GM;Astrom, A
对象：目前关于肩/颈区域肌肉不适发生的假设认为，短时间完全放松肌肉对于避免不适是必不可少的。另一种假设是，这些疾病与工作中的心理社会条件有关。为了验证这些假设，23名医务秘书进行了调查。研究方法：采用肌电图（EMG）技术和暴露量变化分析（伊娃）技术对双侧上斜方肌在工作过程中的负荷模式进行了评估。此外，还测量了双侧阔肌和胸骨上的压痛阈值（PPT）。工作中的心理社会条件进行了评估问卷。结果如下：与健康组相比，有主诉的医务秘书完全或接近完全放松肌肉的事件明显较少。投诉组在低负荷水平下（约1000 kg）的负荷模式更单调。1%-5%最大自主收缩），而健康组具有更频繁的停顿，但也有更频繁的短负荷峰值。与健康组相比，抱怨组的PPT读数较低。然而，整个组的PPT比文献中通常报道的要低得多。在心理社会问卷的12个问题中，只有一个关于工作任务满意度的问题显示出两组之间的显着差异。结论：研究结果支持了这样的假设：没有抱怨的秘书肌肉完全放松的情况更频繁。一个显着的差异，发现关于工作任务的满意度。
Object: A current hypothesis for the genesis of muscular complaints in the shoulder/neck region postulates that short periods with a completely relaxed muscle are essential to avoid complaints. Another hypothesis is that these disorders are related to psychosocial conditions at work. In order to test these hypotheses, 23 medical secretaries were investigated. Methods: The load pattern during work in the upper trapezius muscle bilaterally was assessed with electromyographic (EMG) technique and exposure variation analysis (EVA). In addition, pressure pain threshold (PPT) was measured on the trapezius muscle bilaterally and on the sternum. Psychosocial conditions at work were assessed with a questionnaire. Results: The medical secretaries with complaints had significantly fewer episodes with totally or close to totally relaxed muscle compared with the healthy group. The group with complaints tended to have a more monotonous load pattern at low load levels (approx. 1%-5% maximum voluntary contraction) while the healthy group had more frequent pauses but also somewhat more frequent short load peaks. The group with complaints showed lower PPT readings compared with the healthy group. However, the whole group had considerably lower PPTs than is usually reported in the literature. Of the 12 questions in the psychosocial questionnaire only one regarding work task satisfaction showed a significant difference between the two groups. Conclusion: Support is found for the hypothesis that secretaries without complaints have more frequent episodes with totally relaxed muscle. A significant difference is found regarding work task satisfaction.