Peripheral Circulatory and Nervous Response to Various Frequencies of Local Vibration Exposure
研究了不同频率局部振动对人体手部血流和神经传导速度的影响，发现低频影响神经系统，而高低频均影响循环系统。
The influence of local vibration exposure on peripheral circulatory and nervous functions was studied in order that the vibration frequency which has the greatest effect on the body could be determined. The response to various vibration frequencies (30, 60, 120, 240, 480 and 960 Hz) under constant acceleration (50 m/s^2) was examined in humans. The hands of five healthy men were exposed for 1 h to local vibration at various frequencies. The skin temperature did not change significantly at any frequency. The finger blood flow decreased after vibration exposure (60 and 480 Hz, p＜0.05; 30 and 120 Hz, p＜0.10). In addition the peripheral nerve conduction velocity became slightly slower after the vibration exposure (30 and 120 Hz, p＜0.10). The physiological responses to local vibration depended on the vibration frequency. The peripheral nervous system was affected by low frequencies, whereas the peripheral circulatory system was influenced not only by low frequencies, but also by high frequencies. The results obtained with humans were consistent with those obtained with animals.