Papi F, Ghione S, Rosa C, Del Seppia C, Luschi P
Dipartimento di Scienze del Comportamento Animale e dell'Uomo, Universitá di Pisa, Italy.
Bioelectromagnetics. 1995;16(5):295-300. doi: 10.1002/bem.2250160505.
To assess the effect of a magnetic treatment on pain perception, we compared the sensory threshold in 18 healthy volunteers. We determined the threshold by noninvasive electrical stimulation of the tooth pulp and skin before and after exposure to an altered magnetic field of low intensity and to a sham treatment. Five different parameters were recorded: the sensory and pain thresholds for the tooth and the sensory, pain, and tolerance thresholds for the skin. Two hours of exposure to a weak, oscillating magnetic fields induced a significant decrease in three parameters (dental sensory and cutaneous pain and tolerance thresholds), whereas the other two parameters showed a similar tendency. When the same subjects were exposed to a sham treatment, only marginal, nonsignificant variations in all parameters were observed. These results represent the first piece of evidence that weak alterations of the magnetic field may induce hyperalgesia in humans.
为评估磁疗对疼痛感知的影响，我们比较了18名健康志愿者的感觉阈值。我们通过在暴露于低强度交变磁场和假治疗前后对牙髓和皮肤进行无创电刺激来确定阈值。记录了五个不同参数：牙齿的感觉和疼痛阈值以及皮肤的感觉、疼痛和耐受阈值。暴露于弱振荡磁场两小时导致三个参数（牙齿感觉、皮肤疼痛和耐受阈值）显著降低，而另外两个参数显示出类似趋势。当相同受试者接受假治疗时，所有参数仅观察到微小的、不显著的变化。这些结果是磁场微弱变化可能在人类中诱发痛觉过敏的首个证据。
