Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada.
Neurosci Lett. 2013 Jan 15;533:81-5. doi: 10.1016/j.neulet.2012.11.036. Epub 2012 Nov 29.
The goal of this study was to investigate the effect of whole body vibration (WBV) on human tactile sensitivity, both the immediate effects and the recovery time in the case of altered sensitivity. Twenty adults (25.3±2.6 years, 10 males) participated in a 10-min WBV session, at a frequency of 42 Hz with 2 mm amplitude in a spiral mode. Sensitivity was measured before and four times after WBV exposure. Pressure sensation was determined using Von Frey monofilaments. Vibration perception thresholds for 30 and 200 Hz were measured using a custom built neurothesiometer. The sensation was measured in 5 anatomical regions of the right foot. Sensitivity of measured cutaneous perception was significantly reduced. Fast-adapting mechanoreceptors for 200 Hz and 30 Hz showed 5.2 and 3.8 times lower sensation values immediately after WBV, respectively. Pressure sensation was 2 times lower in comparison to the baseline condition. In general, tactile sensitivity recovery time was between 2 and 3 h. WBV influences the discharge of fast-adapting skin mechanoreceptors. By determining the recovery time, it might be possible to estimate how long the effects of WBV on tactile sensitivity last.
本研究旨在探讨全身振动（WBV）对人体触觉敏感性的影响，包括即时效应和敏感性改变时的恢复时间。20 名成年人（25.3±2.6 岁，10 名男性）参加了一项 10 分钟的 WBV 课程，频率为 42 Hz，振幅为 2 毫米，呈螺旋模式。敏感性在 WBV 暴露前和暴露后 4 次进行测量。使用 Von Frey 单丝测定压力感觉。使用定制的神经感觉计测量 30 和 200 Hz 的振动感知阈值。感觉在右脚的 5 个解剖区域进行测量。测量的皮肤感觉敏感性显著降低。200 Hz 和 30 Hz 的快速适应机械感受器的感觉值分别立即降低了 5.2 和 3.8 倍。与基线条件相比，压力感觉降低了 2 倍。总的来说，触觉敏感性的恢复时间在 2 到 3 小时之间。WBV 会影响快速适应皮肤机械感受器的放电。通过确定恢复时间，可能可以估计 WBV 对触觉敏感性的影响持续时间。
