Department of Physical Medicine and Rehabilitation, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
BMC Res Notes. 2022 Sep 9;15(1):297. doi: 10.1186/s13104-022-06181-2.
F wave is one of the nerve conduction studies, mainly used to study the proximal pathway of peripheral nerves. One of its applications is dynamic assessment, i.e., before and after physical activity, when symptoms develop in some patients. Best to our knowledge, few studies evaluate normal dynamic F wave values in healthy individuals. This study aims to determine and compare normal values of several parameters of Compound Muscle Action Potential (CMAP) and F waves of tibial nerves dynamically before and after physical activity in the lower extremities of 34 normal subjects. These parameters were recorded before and after 15 min of continuous walking at intervals of 1, 5, and 10 min after the end of physical activity.
Normal values of CMAP onset latency and amplitude, minimum, maximum, and mean latency of 10 F waves, F chronodispersion, and F persistence were dynamically collected before and during 10 min after physical activity in three phases. Some of the parameters showed significant changes (P < 0.05). Although physical activity showed statistically significant effects on some CMAP and F wave parameters (especially F chronodispersion) in normal subjects, none of them exceeded the normal clinical values introduced in the literature.
F 波是神经传导研究之一，主要用于研究周围神经的近端通路。其应用之一是动态评估，即在某些患者出现症状之前和之后进行，例如在体力活动前后。据我们所知，很少有研究评估健康个体正常动态 F 波值。本研究旨在确定和比较 34 名正常受试者下肢在体力活动前后 15 分钟连续行走 1、5 和 10 分钟后动态记录的复合肌肉动作电位（CMAP）和 F 波的几个参数的正常值。
在三个阶段中，分别在体力活动前后和活动后 10 分钟内动态采集 CMAP 起始潜伏期和幅度、10 个 F 波的最小、最大和平均潜伏期、F 时间离散度和 F 持续时间的正常值。一些参数显示出显著变化（P<0.05）。尽管体力活动对正常受试者的一些 CMAP 和 F 波参数（尤其是 F 时间离散度）具有统计学显著影响，但没有一个参数超过文献中介绍的正常临床值。
