Primary somatosensory cortex discriminates affective significance in social touch
Primary somatosensory cortex discriminates affective significance in social touch
复制标题
DOI：
10.1073/pnas.1113211109
复制
发表时间：
2012-06-19
影响因子：
11.1
通讯作者：
Keysers, Christian
中科院分区：
文献类型：
--
作者：
Gazzola, Valeria;Spezio, Michael L.;Keysers, Christian
另一个人的爱抚是所有情感社会信号中最强大的信号之一。初级体感皮层（si）在多大程度上参与处理这种社交接触的愉悦感尚不清楚。尽管大量的经验证据支持脑岛在触觉情感处理中的作用，但我们认为，通过显示SI对感官爱抚的反应被感知到的爱抚者的性别所改变，SI可能比以前认为的更参与情感处理。在一项功能性核磁共振研究中，我们操纵了与皮肤感官特性无关的爱抚的感知情感质量：异性恋男性认为他们被一个男人或女人爱抚，尽管事实上爱抚总是由一个对条件类型一无所知的女性提供。独立分析表明，SI编码并被爱抚的视觉性别调节，这种影响不太可能来自脑岛。这表明，目前的模型可能低估了手语在社交触摸情感加工中的作用。
Another person's caress is one of the most powerful of all emotional social signals. How much the primary somatosensory cortices (SIs) participate in processing the pleasantness of such social touch remains unclear. Although ample empirical evidence supports the role of the insula in affective processing of touch, here we argue that SI might be more involved in affective processing than previously thought by showing that the response in SI to a sensual caress is modified by the perceived sex of the caresser. In a functional MRI study, we manipulated the perceived affective quality of a caress independently of the sensory properties at the skin: heterosexual males believed they were sensually caressed by either a man or woman, although the caress was in fact invariantly delivered by a female blind to condition type. Independent analyses showed that SI encoded, and was modulated by, the visual sex of the caress, and that this effect is unlikely to originate from the insula. This suggests that current models may underestimate the role played by SI in the affective processing of social touch.