Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Sweden.
Occup Med (Lond). 2009 May;59(3):174-9. doi: 10.1093/occmed/kqp032. Epub 2009 Mar 13.
To establish if intermittent exposure to hand-transmitted vibration had the same effect as continuous exposure on the temporary response of finger tactile and thermal perception thresholds.
Two laboratory experiments were conducted. In each, 10 healthy subjects, five males and five females, participated. The subjects' fingers were exposed to vibration under four conditions with a combination of different periods of exposure and rest periods. The vibration frequency was 125 Hz and the frequency-weighted acceleration was 5 m/s(2). A measure of the tactile or thermal perception was conducted before the different exposures to vibration. Immediately after the vibration exposure, the acute effect was measured continuously for the first 75 s. This was followed by regular measures for a maximum of 30 min.
The results showed that combinations of vibration with different periods of exposure and rest periods significantly influenced vibrotactile perception, but not thermal perception.
These findings suggest that intermittent exposure to hand-transmitted vibration might be more beneficial for the response of the finger vibrotactile sensation than continuous exposure. This finding is inconsistent with the evaluation methods in ISO 5349-1 for vibrotactile sensation, but accurate for thermal perception.
确定间歇性接触手部振动与连续接触对手指触觉和温度感知阈值的临时反应是否有相同的影响。
进行了两项实验室实验。每项实验都有 10 名健康受试者参加，其中 5 名男性，5 名女性。受试者的手指在四种不同的暴露和休息期组合下暴露于振动中。振动频率为 125Hz，加权加速度为 5m/s²。在不同的振动暴露之前进行了触觉或温度感知的测量。振动暴露后，立即连续测量最初的 75 秒，急性效应。之后，最多进行 30 分钟的定期测量。
结果表明，不同暴露期和休息期组合的振动显著影响触觉感知，但不影响温度感知。
这些发现表明，间歇性接触手部振动可能比连续接触对手指触觉的反应更有益。这一发现与 ISO 5349-1 中对触觉的评估方法不一致，但与温度感知的评估方法一致。
