Jaffe R A, Laszewski B L, Carr D B
Bioelectromagnetics. 1981;2(3):227-39. doi: 10.1002/bem.2250020304.
Neuromuscular function in adult male rats was studied following 30 days of exposure to a 60-Hz electric field at 100 kV/m (unperturbed field strength). Isometric force transducers were attached to the tendons of the plantaris (predominantly fast twitch), and soleus (predominantly slow twitch) muscles in the urethan-anesthetized rat. Square-wave stimuli were delivered to the distal stump of the transected sciatic nerve. Several measurements were used to characterized neuromuscular function, including twitch characteristics, chronaxie, tetanic and posttetanic potentiation, and fatigue and recovery. The results from three independent series of experiments are reported. Only recovery from fatigue in slow-twitch muscles was consistently and significantly affected (enhanced) by electric-field exposure. This effect does not appear to be mediated by field-induced changes in either neuromuscular transmission, or in the contractile mechanism itself. It is suggested that the effect may be mediated secondary to an effect on mechanisms regulating muscle blood flow or metabolism.
在成年雄性大鼠暴露于100 kV/m的60赫兹电场（未受干扰的场强）30天后，对其神经肌肉功能进行了研究。在经乌拉坦麻醉的大鼠中，将等长力传感器连接到比目鱼肌（主要为慢肌纤维）和跖肌（主要为快肌纤维）的肌腱上。将方波刺激施加到切断的坐骨神经的远端残端。使用了几种测量方法来表征神经肌肉功能，包括抽搐特性、时值、强直和强直后增强以及疲劳和恢复。报告了三个独立系列实验的结果。只有慢肌纤维的疲劳恢复持续且显著地受到电场暴露的影响（增强）。这种效应似乎不是由电场引起的神经肌肉传递或收缩机制本身的变化介导的。有人提出，这种效应可能继发于对调节肌肉血流或代谢的机制的影响。
