Processing of affective and emotionally neutral tactile stimuli in the insular cortex
Processing of affective and emotionally neutral tactile stimuli in the insular cortex
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DOI：
10.1016/j.dcn.2017.12.006
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发表时间：
2019-02-01
影响因子：
4.7
通讯作者：
Olausson, Hakan
中科院分区：
文献类型：
--
作者：
Davidovic, Monika;Starck, Goran;Olausson, Hakan
触觉刺激对于处理触觉的愉悦方面很重要，而它在处理情绪中性触觉中的作用却很少被探索。在这里，我们使用了一个网络的方法来调查愉快的抚摸触摸和情绪中立的振动触摸的岛屿处理，分析功能磁共振成像数据从23个健康的成年参与者。振动和皮肤抚摸激活的区域在后，中，前。心理生理学的相互作用分析表明，皮肤抚摸增加后腹前肌之间的功能连接。相反，振动增加了后部和背侧前额叶之间的功能连接，并诱导了更强的默认模式网络活动的减少相比，中风。这些结果证实了先前的研究结果，即后额叶处理情感触摸信息。我们认为，这是通过将触觉信息从后额叶传递到腹前额叶来实现的，腹前额叶是与大脑的情感部分紧密相连的区域。然而，我们的研究结果也表明，触觉信息处理的情感价较低。在这个过程中的一个中心枢纽似乎是右背前肌。
The insula is important for the processing of pleasant aspects of touch whereas its role in the processing of emotionally neutral touch has been less explored. Here, we used a network approach to investigate the insular processing of pleasant stroking touch and emotionally neutral vibratory touch, analysing functional magnetic resonance imaging data from 23 healthy adult participants. Vibration and skin stroking activated areas in the posterior, middle and anterior insula. Psychophysiological interaction analyses suggested that skin stroking increased functional connectivity between the posterior and ventral anterior insula. Vibration instead increased functional connectivity between the posterior and dorsal anterior insula, and induced a stronger decrease of the default mode network activity compared to stroking. These results confirmed findings from previous studies showing that the posterior insula processes affective touch information. We suggest that this is accomplished by relaying tactile information from the posterior insula to ventral anterior insula, an area tightly connected to the emotional parts of the brain. However, our results also suggested that the insula processes tactile information with less emotional valence. A central hub in this processing seemed to be the right dorsal anterior insula.