Strenge H, Zichner V, Niederberger U
Clinic of Neurology, University of Kiel, Germany.
Funct Neurol. 1996 Jan-Feb;11(1):17-27.
Exteroceptive silent periods (ESPs) of masseter muscle activity evoked by electrical stimulation of the mental nerve were studied over a large range of prepain intensities and at pain threshold in 44 normal subjects. Seven levels of stimulus intensity, based on individual sensory and pain thresholds, were applied and the relationship between ESPs, stimulus intensity and perception, as manifested by the subjective verbal response, was investigated. The analysis revealed that the occurrence of ESPs was not related to the stimulus intensity at the pain threshold. There were individually different patterns of progressive response to increasing current intensities within the pre-pain range in many cases. On the other hand, almost half of all the subjects investigated showed no or only occasional ESPs. In view of this variability the concept of ESPs being a nociceptive behavioural response has to be questioned.
在44名正常受试者中，研究了在大范围的预痛强度以及疼痛阈值下，由颏神经电刺激诱发的咬肌活动的外感受性静息期（ESPs）。基于个体的感觉阈值和疼痛阈值，施加了七个刺激强度水平，并研究了ESPs、刺激强度与由主观言语反应所表现出的感觉之间的关系。分析表明，在疼痛阈值时ESPs的出现与刺激强度无关。在许多情况下，在预痛范围内对增加的电流强度存在个体不同的渐进反应模式。另一方面，几乎一半的受调查受试者未出现或仅偶尔出现ESPs。鉴于这种变异性，ESPs作为一种伤害性行为反应的概念必须受到质疑。
