Visual Distortion of Body Size Modulates Pain Perception
Visual Distortion of Body Size Modulates Pain Perception
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DOI：
10.1177/0956797611398496
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发表时间：
2011-03-01
影响因子：
8.2
通讯作者：
Haggard, Patrick
中科院分区：
文献类型：
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作者：
Mancini, Flavia;Longo, Matthew R.;Haggard, Patrick
疼痛是一种复杂的主观体验，受到许多环境因素的影响。例如，仅仅观察身体就能减少急性身体疼痛的强度。在这项研究中，我们研究了这种视觉诱导的镇痛是否受到受刺激身体部位的视觉大小的调节。我们测量了接触热痛阈值，同时参与者在三种尺寸条件下观察自己的手或中性物体：缩小、实际尺寸或放大。身体的视觉是镇痛的，热痛阈值平均增加3.2摄氏度。我们进一步发现，视觉放大的手增强了镇痛，而视觉缩小的手则减少了镇痛。这些结果表明，疼痛感知依赖于身体的多感官表征，并且身体尺寸的视觉扭曲调节了疼痛的感觉成分。
Pain is a complex subjective experience that is shaped by numerous contextual factors. For example, simply viewing the body reduces the reported intensity of acute physical pain. In this study, we investigated whether this visually induced analgesia is modulated by the visual size of the stimulated body part. We measured contact heat-pain thresholds while participants viewed either their own hand or a neutral object in three size conditions: reduced, actual size, or enlarged. Vision of the body was analgesic, increasing heat-pain thresholds by an average of 3.2 degrees C. We further found that visual enlargement of the viewed hand enhanced analgesia, whereas visual reduction of the hand decreased analgesia. These results demonstrate that pain perception depends on multisensory representations of the body and that visual distortions of body size modulate sensory components of pain.