Stroking hardness changes the perception of affective touch pleasantness across different skin sites
Stroking hardness changes the perception of affective touch pleasantness across different skin sites
复制标题
抚摸硬度会改变不同皮肤部位的情感触觉愉悦感
DOI：
10.1016/j.heliyon.2019.e02141
复制
发表时间：
2019
期刊：
影响因子：
4
通讯作者：
Jinglong Wu
中科院分区：
文献类型：
--
作者：
Jiabin Yu;Jiajia Yang ;Yinghua Yu;Qiong Wu;Yoshimichi Ejima;Jiajia Yang;Satoshi Takahashi;Jinglong Wu
多毛皮肤中的人类无髓鞘触觉传入神经（CT 传入神经）被认为参与了触觉情感方面的传递。人类皮肤对情感触摸的感知有何不同已经取得了实质性进展；然而，之前的大多数研究主要集中在抚摸速度和愉悦度评分之间的关系。在这里，我们研究抚摸硬度如何影响情感触摸的感知。用四种不同硬度的刷子在三种不同的力下给予情感触觉刺激，这些刺激呈现在手掌或前臂上。为了量化刺激的物理因素（刷子硬度），十名天真的健康参与者使用七点量表评估了刷子硬度。在这 10 名参与者的基础上，又添加了 5 名参与者，使用视觉模拟量表 (VAS) 来评估画笔抚摸的享乐价值。我们发现，对皮肤的舒适度评级导致人们偏爱轻柔的抚摸，与重度、用力的抚摸相比，这种抚摸被认为更令人愉悦。我们的结果表明，就愉悦感而言，前臂的毛状皮肤比手掌的无毛皮肤更容易受到抚摸硬度的影响。当前研究的这些发现扩展了与抚摸特征对愉悦度评分的影响相关的越来越多的文献。
Human unmyelinated tactile afferents (CT afferents) in hairy skin are thought to be involved in the transmission of affective aspects of touch. How the perception of affective touch differs across human skin has made substantial progress; however, the majority of previous studies have mainly focused on the relationship between stroking velocities and pleasantness ratings. Here, we investigate how stroking hardness affects the perception of affective touch. Affective tactile stimulation was given with four different hardness of brushes at three different forces, which were presented to either palm or forearm. To quantify the physical factors of the stimuli (brush hardness), ten naïve, healthy participants assessed brush hardness using a seven-point scale. Based on these ten participants, five more participants were added to rate the hedonic value of brush stroking using a visual analogue scale (VAS). We found that pleasantness ratings over the skin resulted in a preference for light, soft stroking, which was rated as more pleasant when compared to heavy, hard stroking. Our results show that the hairy skin of the forearm is more susceptible to stroking hardness than the glabrous of the palm in terms of the perception of pleasantness. These findings of the current study extend the growing literature related to the effect of stroking characteristics on pleasantness ratings.