Morozumi Kazunori, Morishita Katsuyuki, Tojima Michio, Inomata Takashi
Department of Physical Therapy, School of Health Sciences, Tokyo International University: 1-13-1 Matobakita, Kawagoe-shi, Saitama 350-1197, Japan.
Department of Physical Therapy, Faculty of Social Work Studies, Josai International University, Japan.
J Phys Ther Sci. 2024 May;36(5):278-283. doi: 10.1589/jpts.36.278. Epub 2024 May 1.
[Purpose] This study aimed to investigate the effects of repetitive peripheral magnetic stimulation of the common fibular nerve on the modification of neural circuit function as measured through the soleus muscle Hoffmann reflex. [Participants and Methods] Twenty-four healthy adult males were randomly and equally divided into the magnetic stimulation (experimental) and control groups. The Hoffmann reflex of the soleus muscle was analyzed before and after 10 min of repetitive peripheral magnetic stimulation for the experimental group and before and after 10 min of rest for the control group. The averages of the values for the maximum amplitude and latency of the Hoffman reflex across twenty repetitions were recorded and compared. [Results] The Hoffmann reflex amplitude decreased following stimulation in the experimental group, and significant variations were observed between the experimental and control groups. [Conclusion] The change in the Hoffmann reflex amplitude may have been caused by the magnetic stimulation to I-a sensory fibers on the common fibular nerve, suggesting that magnetic stimulation induces reciprocal inhibition of motor neurons through synapses in the spinal cord.
[目的]本研究旨在通过比目鱼肌霍夫曼反射来探究反复经皮腓总神经磁刺激对神经回路功能改变的影响。[参与者与方法]24名健康成年男性被随机平均分为磁刺激（实验组）和对照组。对实验组进行10分钟反复经皮腓总神经磁刺激，对对照组进行10分钟休息，分别在刺激或休息前后分析比目鱼肌的霍夫曼反射。记录并比较20次重复中霍夫曼反射最大波幅和潜伏期的平均值。[结果]实验组刺激后霍夫曼反射波幅降低，实验组与对照组之间观察到显著差异。[结论]霍夫曼反射波幅的变化可能是由腓总神经上的I-a感觉纤维受到磁刺激引起的，这表明磁刺激通过脊髓中的突触诱导运动神经元的交互抑制。
