Factors associated with the modulation of pain by visual distortion of body size.
Factors associated with the modulation of pain by visual distortion of body size.
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DOI：
10.3389/fnhum.2014.00137
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发表时间：
2014
影响因子：
2.9
通讯作者：
Morioka S
中科院分区：
文献类型：
--
作者：
Osumi M;Imai R;Ueta K;Nakano H;Nobusako S;Morioka S
利用身体尺寸视觉扭曲（VDBS）调节疼痛已成为各种报告的主题。然而，VDBS 对疼痛影响的机制却很少被研究。在本研究中，研究了与 VDBS 调节疼痛阈值相关的因素。向 44 名健康成年人提供了手部放大图像形式的视觉反馈，以检查疼痛的变化。对于疼痛阈值较高的参与者，当提供手部放大图像的视觉反馈时，两点辨别阈值会降低。相比之下，具有较低疼痛阈值且具有手部放大图像视觉反馈的参与者会对手部放大图像产生不愉快的情绪。有趣的是，在一些受试者中，这种情绪反应与消极的身体意识密切相关。这些数据表明，只有当触觉感知生动并且对放大图像的情绪反应适度时，以手部放大图像形式的视觉反馈才会产生镇痛效果。结果还表明，负性身体意识对于使用 VDBS 调节疼痛很重要。
Modulation of pain using visual distortion of body size (VDBS) has been the subject of various reports. However, the mechanism underlying the effect of VDBS on pain has been less often studied. In the present study, factors associated with modulation of pain threshold by VDBS were investigated. Visual feedback in the form of a magnified image of the hand was provided to 44 healthy adults to examine changes in pain. In participants with a higher pain threshold when visual feedback of a magnified image of the hand was provided, the two-point discrimination threshold decreased. In contrast, participants with a lower pain threshold with visual feedback of a magnified image of the hand experienced unpleasant emotions toward the magnified image of the hand. Interestingly, this emotional reaction was strongly associated with negative body consciousness in several subjects. These data suggested an analgesic effect of visual feedback in the form of a magnified image of the hand is only when tactile perception is vivid and the emotional reaction toward the magnified image is moderate. The results also suggested that negative body consciousness is important for the modulation of pain using VDBS.