PDF(Pubmed)
Abstract：
Tactile perception encompasses several submodalities that are realized with distinct sensory subsystems. The processing of those submodalities and their interactions remains understudied. We developed a paradigm consisting of three types of touch tuned in terms of their force and velocity for different submodalities: discriminative touch (haptics), affective touch (C-tactile touch), and knismesis (alerting tickle). Touch was delivered with a high-precision robotic rotary touch stimulation device. A total of 39 healthy individuals participated in the study. EEG cluster analysis revealed a decrease in alpha and beta range (mu-rhythm) as well as theta and delta increase most pronounced to the most salient and fastest type of stimulation. The participants confirmed that slower stimuli targeted to affective touch low-threshold receptors were the most pleasant ones, and less intense stimuli aimed at knismesis were indeed the most ticklish ones, but those sensations did not form an EEG cluster, probably implying their processing involves deeper brain structures that are less accessible with EEG.
摘要：
触觉感知包括几个通过不同的感觉子系统实现的子模式。这些子模式的处理及其相互作用仍未得到充分研究。我们开发了一种范式，该范式由三种类型的触摸组成，该三种类型的触摸针对不同的子模态进行了力和速度调整：判别触摸（触觉），情感触摸（C触觉触摸），和knissesis（警告痒）。使用高精度机器人旋转触摸刺激设备提供触摸。共有39名健康个体参与研究。EEG聚类分析显示，α和β范围（mu节律）的降低以及θ和δ的增加在最明显和最快的刺激类型中最为明显。参与者证实，针对情感触摸低阈值受体的较慢刺激是最令人愉快的，针对knissesis的不那么强烈的刺激确实是最棘手的，但是这些感觉并没有形成脑电图簇，可能暗示它们的处理涉及更深层的大脑结构，而这些结构在脑电图中难以接近。
