Motor point stimulation induces more robust F‐waves than peripheral nerve stimulation
Motor point stimulation induces more robust F‐waves than peripheral nerve stimulation
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运动点刺激比周围神经刺激产生更强劲的 F 波
DOI：
10.1111/ejn.15625
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发表时间：
2022
影响因子：
3.4
通讯作者：
Masani Kei
中科院分区：
文献类型：
--
作者：
Kaneko Naotsugu;Fok Kai Lon;Nakazawa Kimitaka;Masani Kei
F波是通过运动神经的逆向放电对周围神经进行电刺激而引起的运动反应，反映了运动神经元的兴奋性。为了诱导 F 波，使用经皮周围神经刺激 (PNS)，通过神经分支上的经皮电极激活神经分支。另一种激活周围神经的方法，即运动点刺激 (MPS)，可向肌腹提供电刺激，但尚未用于诱导 F 波。在我们之前的研究中，我们观察到 MPS 诱导 F 波样反应，即在超最大刺激下 F 波潜伏期的运动反应。在这里，我们进一步研究了比目鱼肌中 MPS 与 PNS 诱导的 F 波样反应。十三个人参与了这项研究。我们将 MPS 和 PNS 应用于参与者的左比目鱼肌。使用单极双脉冲刺激，PNS 诱导的第二 H 反射的幅度下降，而 MPS 诱导的 F 波潜伏期运动反应的幅度没有下降。这些结果表明，MPS 诱导的 F 波潜伏期的运动反应不是 H 反射，而是 F 波。我们还发现，与使用 PNS 诱导的 F 波相比，MPS 诱导的 F 波具有更大的振幅和更高的持续性，并且引起的疼痛更少。我们得出的结论是，与 PNS 相比，MPS 更能一致地诱发 F 波的逆向放电。
The F‐wave is a motor response induced by electrical stimulation of peripheral nerves via the antidromic firing of motor nerves, which reflects the motoneuron excitability. To induce F‐waves, transcutaneous peripheral nerve stimulation (PNS) is used, which activates nerve branches via transcutaneous electrodes over the nerve branches. An alternative method to activate peripheral nerves, that is, motor point stimulation (MPS), which delivers electrical stimulation over the muscle belly, has not been used to induce F‐waves. In our previous studies, we observed that MPS induced F‐wave‐like responses, that is, motor responses at the latency of F‐waves at a supramaximal stimulation. Here, we further investigated the F‐wave‐like responses induced by MPS in comparison with PNS in the soleus muscle. Thirteen individuals participated in this study. We applied MPS and PNS on the participant's left soleus muscle. Using a monopolar double‐pulse stimulation, the amplitude of the second H‐reflex induced by PNS decreased, whereas the amplitude of the motor response at the F‐wave latency induced by MPS did not decrease. These results suggest that the motor response at the F‐wave latency induced by MPS was not an H‐reflex but an F‐wave. We also found that the F‐wave induced by MPS had a greater amplitude and higher persistence and caused less pain when compared with the F‐waves induced using PNS. We conclude that MPS evokes antidromic firing inducing F‐waves more consistently compared with PNS.