Milne R J, Dawson N J, Butler M J, Lippold O C
Exp Neurol. 1985 Oct;90(1):96-107. doi: 10.1016/0014-4886(85)90043-3.
Electro-acupuncture is one of many physical measures used to relieve musculoskeletal pain and to improve the associated restricted range of motion. Experiments were designed to determine whether or not acupuncture-like stimulation inhibits stretch reflexes in an arm extensor muscle in human volunteers. Surface electromyographic recordings were made on the right extensor digitorum communis muscle and averaging techniques were used to study the reflex responses to brief deflection of the finger with a solenoid-driven probe. The ratio M1:M2 of two components of the reflex was reduced during continuous acupuncture-like stimulation of the contralateral first dorsal interosseus and extensor digitorum communis muscles near their motor points (acupuncture points LI 4 and LI 11). Concomitant changes in skin temperature were observed on the forehead and in the arm in which acupuncture-like stimulation was used. In control experiments, when the acupuncture needles were inserted subcutaneously and stimulated with the same current parameters at distinctly uncomfortable intensities, no change in the reflexes occurred. These findings show that acupuncture-like stimulation exerts physiologic effects on the central nervous system, mediated presumably by muscle afferent fibers. The effects may be relevant to relief of muscle spasm and musculoskeletal pain, and restoration of mobility.
电针是用于缓解肌肉骨骼疼痛和改善相关活动范围受限的多种物理措施之一。实验旨在确定类似针刺的刺激是否会抑制人类志愿者手臂伸肌的牵张反射。在右侧指总伸肌上进行表面肌电图记录，并使用平均技术研究用螺线管驱动的探头对手指进行短暂偏转时的反射反应。在对侧第一背侧骨间肌和指总伸肌靠近其运动点（穴位LI 4和LI 11）进行连续类似针刺刺激时，反射的两个成分的M1:M2比值降低。在前额和使用类似针刺刺激的手臂上观察到皮肤温度的伴随变化。在对照实验中，当将针灸针皮下插入并用相同电流参数以明显不舒服强度刺激时，反射没有变化。这些发现表明，类似针刺的刺激对中枢神经系统产生生理效应，推测是由肌肉传入纤维介导的。这些效应可能与缓解肌肉痉挛和肌肉骨骼疼痛以及恢复活动能力有关。
