多点触觉定位

在左手食指第一节腹侧分别进行1个点、2个点和3个点的定位实验，探讨了多点定位的特点。实验发现，按单个点的定位误差来计算．1个点和3个点的定位误差无显著差异，且二者均显著地低于2个点的定位误差；在2个点的定位中，一个点的定位误差是此2个点的空间距离的函数．定位误差有随距离加大而增加的趋势；在3个点的定位中．同一个点在不同的3点组台中的定位误差无显著差异。结果指示，多点触觉定位除以受刺激的躯体部位框架为参照（基本参照）外，还受到诸刺激点构成的刺激模式（次级参照）的影响。

MULTIPLE-POINT LOCALIZATION ON SKIN

The aim of this paper is to compare the accuracy of locaIization of one, two and three points on skin. Four reference points at different locations on the pad of the 1eft index finger were tested throughout the experiments Tactile stimulation and visual response with an outline of the index finger pad were used. The main results of the experiments were as fo1lows: 1)The errors one-point localization in the experiments were not significantly different from those of the one-or threepoint localization at a trial, but both kinds of errors were sma1ler in mumber than those in the experiment with two-point localization at a trial. 2)In the experiment with two-point localization at at a tria1,the error of localization for any one point is the function of the distaoce between the two points;the errors tended to increase with the distance. 3) In the experiment with three-point Iocalization at a trial,the error of localization for any one point was about the same no matter what three-point combination it was involved in. These results suggested that there were two reference systems in the multiple-point localization on skin,the primary reference-schema being the part of the body stimu1ated,and the secondary being the points stimulated at a trial.