Lundeberg T, Abrahamsson P, Bondesson L, Haker E
Department of Physiology II, Karolinska Institutet, Stockholm, Sweden.
Scand J Rehabil Med. 1988;20(4):149-59.
The effect of vibratory stimulation on experimental pain of the skin overlying the right and left extensor carpi radialis longus muscle induced by electrical stimulation was studied in 16 healthy subjects and in 18 patients suffering from chronic epicondylalgia of the right elbow. In the healthy subjects there were no side differences whereas in the patients, the skin pain threshold over the painful right muscle was lower than that on the left unaffected side under resting conditions. After vibratory stimulation, the skin pain threshold increased bilaterally by 1.1-1.6 times the pre-stimulation threshold in the healthy subjects and by 1.2-2.3 times this threshold in the patients. In 8 of the healthy subjects there was an increase in peripheral blood flow during stimulation and in 8 there was a small decrease. In 13 patients the change in pain threshold was seen in phase with the local increase and peripheral decrease in peripheral blood flow. In all individuals, the pain thresholds were regained within 45 min of cessation of stimulation. This was in contrast to the general subjective pain in the patients; 12 patients reported that the relief of pain lasted for a period of 1-7 hours.
在16名健康受试者和18名患有右肘慢性肱骨外上髁炎的患者中，研究了振动刺激对由电刺激诱发的左右桡侧腕长伸肌上方皮肤实验性疼痛的影响。在健康受试者中，两侧没有差异，而在患者中，在静息状态下，疼痛的右侧肌肉上方的皮肤痛阈低于左侧未受影响侧。振动刺激后，健康受试者双侧皮肤痛阈增加到刺激前阈值的1.1 - 1.6倍，患者增加到该阈值的1.2 - 2.3倍。在8名健康受试者中，刺激期间外周血流量增加，8名略有减少。在13名患者中，痛阈变化与外周血流量的局部增加和外周减少同步出现。在所有个体中，刺激停止后45分钟内痛阈恢复。这与患者的一般主观疼痛形成对比；12名患者报告疼痛缓解持续了1 - 7小时。
