The thermal grill illusion and what is painful about it
The thermal grill illusion and what is painful about it
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DOI：
10.1016/j.neulet.2011.09.061
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发表时间：
2011-11-07
影响因子：
2.5
通讯作者：
Hoelzl, Rupert
中科院分区：
文献类型：
--
作者：
Bach, Patrick;Becker, Susanne;Hoelzl, Rupert
“热烧烤错觉”指的是热和疼痛的矛盾感觉，这是由于对皮肤同时施加交错的热和冷刺激造成的。它提供了一个有趣的模型，在神经系统中的整合机制，应该是相关的解释在慢性疼痛的病因不明的超敏反应。本研究的目的是调查的感知品质引起的重建的原始烧烤刺激器，并比较这些品质与那些引起的相同尺寸的单一温度热电极。健康的参与者通过选择描述感知感官品质的形容词来进行这些比较。我们假设，热烧烤会被认为是不同的单一温度热刺激疼痛阈值附近，因为不同的感觉品质。此外，由烤架引起的质量预计将不同于由其单一组分温度引起的质量。热烤架引起了一个复杂的反射，这是区分几乎完美的热刺激。热烤架的感知质量的模式不同于单一温度的温暖和热刺激。与疼痛相关的感觉在烤架上比在接近疼痛阈值的单一热刺激中更少。烧烤刺激的质量的频谱变化幅度不大，刺激持续时间减少的冷分量和并发增加的热分量。总之，热烤架的感受不仅仅是疼痛-它可以被理解为从热到疼痛过渡的一种元感觉感受。(C)2011爱思唯尔爱尔兰有限公司保留所有权利。
The 'thermal grill illusion' refers to paradoxical sensations of heat and pain, resulting from simultaneous application of interlaced warm and cold stimuli to the skin. It provides an interesting model of integrative mechanisms in the nervous system, supposed to be relevant in explaining the hypersensitivity found in chronic pain of unclear etiology. The aim of this study is to investigate the perceptual qualities elicited by a reconstruction of the original grill stimulator and to compare these qualities with those elicited by a single temperature thermode of identical dimensions. Healthy participants performed these comparisons by choosing adjectives describing the perceived sensory qualities. We hypothesized that the thermal grill would be perceived as different from a single temperature hot stimulus near pain threshold because of varying sensory qualities. Moreover, the qualities elicited by the grill were expected to be different from the qualities elicited by its single component temperatures. The thermal grill elicited a complex percept, which was distinguished almost perfect from a hot stimulus. The pattern of perceived qualities of the thermal grill differed from single temperature warm and hot stimuli. Pain-related sensations were less present in the grill percept than in a single hot stimulus near pain threshold. The spectrum of qualities of the grill stimulus changed marginally with stimulus duration by decrease of a cold component and concurrent increase of a heat component. In conclusion, the percept of the thermal grill is not simply pain - it can be understood as a metaesthetic percept at the transition from heat to pain. (C) 2011 Elsevier Ireland Ltd. All rights reserved.