Higashiyama A, Rollman G B
Department of Psychology, University of Western Ontario, London, Canada.
IEEE Trans Biomed Eng. 1991 Jul;38(7):679-86. doi: 10.1109/10.83569.
Two experiments investigated perceived locus and intensity for electrocutaneous stimulation. In Experiment 1, 21 subjects reported the perceived locus for various combinations of four electrode sites, two current directions, two pulse characteristics (single versus multiple), and two sensation levels (detection versus pain). In Experiment 2, 16 subjects reported the perceived locus and intensity for a wide range of current levels and two polarity conditions. The main results were 1) sensations were likely to be perceived under the cathode at detection levels, but under both electrodes at intense levels; 2) the "cathode" localization was gradually supplanted by "both" ("anode" and "cathode") localization with increasing current; 3) subjective intensity under the cathode was greater than that under the anode; 4) the effects of cathode position on perceived locus were found for only some pairs of electrodes. These results challenge the simple hypothesis that electrical stimulation of the skin through paired electrodes is perceived under the cathode.
两项实验研究了经皮电刺激的感知位置和强度。在实验1中，21名受试者报告了四个电极部位、两种电流方向、两种脉冲特征（单脉冲与多脉冲）以及两种感觉水平（检测与疼痛）的各种组合下的感知位置。在实验2中，16名受试者报告了广泛电流水平和两种极性条件下的感知位置和强度。主要结果如下：1）在检测水平时，感觉可能在阴极下被感知，但在高强度水平时，在两个电极下都会被感知；2）随着电流增加，“阴极”定位逐渐被“两个电极”（“阳极”和“阴极”）定位所取代；3）阴极下的主观强度大于阳极下的主观强度；4）仅在某些电极对中发现阴极位置对感知位置的影响。这些结果挑战了通过成对电极对皮肤进行电刺激在阴极下被感知的简单假设。
