Cooling the Thermal Grill Illusion through Self-Touch
Cooling the Thermal Grill Illusion through Self-Touch
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DOI：
10.1016/j.cub.2010.08.038
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发表时间：
2010-10-26
期刊：
影响因子：
9.2
通讯作者：
Haggard, Patrick
中科院分区：
文献类型：
--
作者：
Kammers, Marjolein P. M.;de Vignemont, Frederique;Haggard, Patrick
急性外周疼痛通过脊髓水平的多感觉相互作用而减轻[1]。中枢性疼痛通过皮质体表征的重组而减轻[2，3]。我们在这里表明，急性疼痛也可以通过自我触摸的多感觉整合来减轻，它提供了本体感受，热和触觉输入，形成了连贯的身体表征[4，5]。我们将自我触摸与热格栅错觉（TGI）结合起来[6]。在传统的TGI中，参与者将手指按在两个温暖的物体上，围绕着一个凉爽的物体。温暖的环境暴露了疼痛的途径，这矛盾地导致凉爽的物体感到痛苦的热。在这里，我们加热每只手的食指和无名指，同时冷却中指。紧接着，右手的这三根手指与左手的这三根手指碰在了一起。这种自我触摸导致感知热量减少了64%。我们发现，这种矛盾的释放矛盾的热量不能单独用低水平的触摸温度相互作用来解释。为了减轻疼痛，我们常常用另一只手抓住疼痛的手。我们在这里表明，自我触摸不仅门疼痛信号到达大脑[7-9]，而且，通过多感觉整合，增加疼痛传入投射的认知身体表征的一致性[10]。
Acute peripheral pain is reduced by multisensory interactions at the spinal level [1]. Central pain is reduced by reorganization of cortical body representations [2, 3]. We show here that acute pain can also be reduced by multisensory integration through self-touch, which provides proprioceptive, thermal, and tactile input forming a coherent body representation [4, 5]. We combined self-touch with the thermal grill illusion (TGI) [6]. In the traditional TGI, participants press their fingers on two warm objects surrounding one cool object. The warm surround unmasks pain pathways, which paradoxically causes the cool object to feel painfully hot. Here, we warmed the index and ring fingers of each hand while cooling the middle fingers. Immediately after, these three fingers of the right hand were touched against the same three fingers on the left hand. This self-touch caused a dramatic 64% reduction in perceived heat. We show that this paradoxical release from paradoxical heat cannot be explained by low-level touch-temperature interactions alone. To reduce pain, we often clutch a painful hand with the other hand. We show here that self-touch not only gates pain signals reaching the brain [7-9] but also, via multisensory integration, increases coherence of cognitive body representations to which pain afferents project [10].