Fukuda H, Satow A, Miyaoka T
Shinrigaku Kenkyu. 1982 Aug;53(3):169-73.
Using vibrotactile stimuli, equal-sensation contours and a threshold curve were determined on the glabrous skin of the human hand. Equal-sensation contours were measured between 1 Hz and 16 Hz. When plotted on log-log coordinates, they monotonically decreased as a function of frequency and were downward by concaved. The threshold curve was measured between 1 Hz and 50 Hz. Its values decreased linearly from 1 Hz to 16 Hz, became constant at 16-35 Hz, and decreased again at 35-50 Hz. Therefore, at the stimulus range of 1-16 Hz, equal-sensation contours were downward concave and the threshold curve was more or less linear. This discrepancy seems to be caused by the differences in mechanoreceptor types which take part in subjective responses: suprathreshold sensation depends on several types of mechanoreceptors, whereas vibrotactile thresholds depends mainly on RA receptors (Meissner corpuscles).
利用振动触觉刺激，在人手无毛皮肤上确定了等感觉轮廓线和阈值曲线。等感觉轮廓线是在1赫兹至16赫兹之间测量的。当绘制在对数-对数坐标上时，它们随频率单调下降且呈下凹状。阈值曲线是在1赫兹至50赫兹之间测量的。其值从1赫兹到16赫兹呈线性下降，在16至35赫兹保持恒定，在35至50赫兹再次下降。因此，在1至16赫兹的刺激范围内，等感觉轮廓线下凹，而阈值曲线或多或少呈线性。这种差异似乎是由参与主观反应的机械感受器类型的差异引起的：阈上感觉取决于几种类型的机械感受器，而振动触觉阈值主要取决于RA感受器（迈斯纳小体）。
