Feeling numb: Temperature, but not thermal pain, modulates feeling of body ownership
Feeling numb: Temperature, but not thermal pain, modulates feeling of body ownership
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DOI：
10.1016/j.neuropsychologia.2011.02.039
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发表时间：
2011-04-01
期刊：
影响因子：
2.6
通讯作者：
Haggard, Patrick
中科院分区：
文献类型：
--
作者：
Kammers, Marjolein P. M.;Rose, Katy;Haggard, Patrick
疼痛、体温调节和身体所有权之间存在重要联系。例如，由于慢性疼痛或“橡胶手错觉”（RHI）而引起的身体所有权感觉的改变与受影响肢体的温度降低有关。然而，这个三元组中的因果关系还没有很好地理解。因此，我们研究了外部操纵体温是否会影响身体所有权。我们使用热电极使健康参与者的右手痛苦地冷，冷，中性，温暖或痛苦地热。接下来，我们诱导RHI，并研究其在手的感知位置，对身体所有权的主观感觉，在手的温度和物理变化的影响。我们重复以前的报告，诱导RHI产生肢体温度下降。重要的是，我们第一次证明了相反方向的因果效应。冷却参与者的手增加了RHI的强度，而从外部加热手则降低了RHI的强度。最后，我们表明，这些温度的痛苦的极端不调制的RHI。因此，虽然温度感觉是身体所有权的重要驱动力，但疼痛似乎绕过了体现的多感觉机制。(C)2011爱思唯尔有限公司保留所有权利。
There is an important link between pain, regulation of body temperature, and body ownership. For example, an altered feeling of body ownership - due to either chronic pain or "rubber-hand illusions" (RHI) - is associated with reduced temperature of the affected limb. However, the causal relationships within this triad are not well understood. We therefore investigated whether external manipulation of body temperature can influence body ownership. We used a thermode to make the right hand of healthy participants either painfully cold, cool, neutral, warm or painfully hot. Next, we induced the RHI and investigated its effects on the perceived position of the hand, on the subjective feeling of body ownership, and on physical changes in hand temperature. We replicate previous reports that inducing the RHI produces a decrease in limb temperature. Importantly, we demonstrate for the first time a causal effect in the opposite direction. Cooling down the participant's hand increased the strength of the RHI, while warming the hand externally decreased the strength of the RHI. Finally, we show that the painful extremes of these temperatures do not modulate the RHI. Hence, while thermosensation is an important driver of body ownership, pain seems to bypass the multisensory mechanisms of embodiment. (C) 2011 Elsevier Ltd. All rights reserved.