Investigation of anodal stimulation and its implications for F-wave examinations
Investigation of anodal stimulation and its implications for F-wave examinations
复制标题
阳极刺激及其对 F 波检查的影响的研究
作者：
Kanbayashi T;Yamauchi T;Miyaji Y;Sonoo M
前言：最近的研究表明，刺激发生在刺激电极的阳极，而不是阳极块。这种现象可能是F波检查中的一个误区。他们的尺神经在手腕处被刺激，阴极被放置在远端。结果：在阳极近端22 mm处，感觉神经纤维和运动神经纤维均产生负极刺激，理论上可使F波潜伏期缩短约0.8ms。将阳极从神经上移开，就不太可能刺激阳极。相反，阴极远离神经的位置降低了阳极刺激的阈值，这是一种新发现的阴极和阳极之间的相互作用。结论：在本工作中，我们确定了阳极刺激的详细特征和对F波检查的潜在影响。肌肉神经56：51-56,2017。
Introduction: Recent studies have shown that stimulation occurs at the anode of stimulating electrodes instead of anodal block. This phenomenon may be a pitfall in F‐wave examinations.Methods: Subjects included 10 healthy volunteers. Their ulnar nerve was stimulated at the wrist with the cathode placed distally. Antidromic impulses were evaluated using mixed nerve action potential (MNAP) at the elbow.Results: Anodal stimulation occurred for both sensory and motor fibers at 22 mm proximal to the anode, on average, which may theoretically shorten the F‐wave latency by about 0.8 ms. Displacement of the anode away from the nerve made anodal stimulation less likely. In contrast, displacement of the cathode away from the nerve lowered the threshold for anodal stimulation, a newly found interaction between cathode and anode.Conclusions: In this work we identified detailed features of anodal stimulation and potential influence on F‐wave examinations.Muscle Nerve56: 51–56, 2017.