Department of Exercise Science.
J Sports Sci Med. 2011 Mar 1;10(1):39-44. eCollection 2011.
The electric field induced by repetitive peripheral magnetic stimulation (RPMS) is able to activate muscles artificially due to the stimulation of deep intramuscular motor axons. RPMS applied to the muscle induces proprioceptive input to the central nervous system in different ways. Firstly, the indirect activation of mechanoreceptors and secondly, direct activation of afferent nerve fibers. The purpose of the study was to examine the effects of RPMS applied to the soleus. Thirteen male subjects received RPMS once and were investigated before and after the treatment regarding the parameters maximal M wave (Mmax), maximal H-reflex (Hmax), Hmax/Mmax-ratio, Hmax and Mmax onset latencies and plantar flexor peak twitch torque associated with Hmax (PTH). Eleven male subjects served as controls. No significant changes were observed for Hmax and PTH of the treatment group but the Hmax/Mmax-ratio increased significantly (p = 0.015) on account of a significantly decreased Mmax (p = 0.027). Hmax onset latencies were increased for the treatment group (p = 0.003) as well as for the control group (p = 0.011) while Mmax onset latencies did not change. It is concluded that the RPMS protocol did not affect spinal excitability but acted on the muscle fibres which are part of fast twitch units and mainly responsible for the generation of the maximal M wave. RPMS probably modified the integrity of neuromuscular propagation. Key pointsRPMS probably did not affect spinal excitability.Data suggested that RPMS likely acted on the muscle fibres which are part of fast twitch units and mainly responsible for the generation of the maximal M wave.RPMS probably modified the integrity of neuromuscular propagation.
重复外周磁刺激（RPMS）产生的电场能够通过刺激深部肌内运动轴突来人工激活肌肉。RPMS 施加于肌肉可通过以下两种不同的方式向中枢神经系统提供本体感觉输入。首先，间接激活机械感受器，其次，直接激活传入神经纤维。本研究旨在检查 RPMS 施加于比目鱼肌的影响。13 名男性受试者接受了一次 RPMS 治疗，并在治疗前后分别对最大 M 波（Mmax）、最大 H 反射（Hmax）、Hmax/Mmax 比值、Hmax 和 Mmax 起始潜伏期以及与 Hmax 相关的跖屈肌峰值 twitch 扭矩（PTH）等参数进行了研究。11 名男性受试者作为对照组。治疗组的 Hmax 和 PTH 没有明显变化，但 Hmax/Mmax 比值显著增加（p = 0.015），原因是 Mmax 显著降低（p = 0.027）。治疗组和对照组的 Hmax 起始潜伏期均增加（p = 0.003 和 p = 0.011），而 Mmax 起始潜伏期没有变化。结论是，RPMS 方案没有影响脊髓兴奋性，但作用于快肌纤维，这些纤维主要负责产生最大 M 波。RPMS 可能改变了神经肌肉传递的完整性。关键点RPMS 可能没有影响脊髓兴奋性。数据表明，RPMS 可能作用于快肌纤维，这些纤维主要负责产生最大 M 波。RPMS 可能改变了神经肌肉传递的完整性。
