Shimada Yoichi, Ito Hiroki, Matsunaga Toshiki, Misawa Akiko, Kawatani Masahito, Itoi Eiji
Rehabilitation Division, Akita University School of Medicine, Akita, Japan.
Biomed Res. 2006 Aug;27(4):183-9. doi: 10.2220/biomedres.27.183.
Catchlike property is the force enhancement produced when a brief, high-frequency burst of pulses is added to a constant low-frequency stimulation. In functional electrical stimulation, constant low-frequency stimulation of approximately 20 Hz has primarily been used to reduce muscle fatigue. The purpose of this study was to investigate the effects of catchlike-inducing intermittent stimulation on muscle fatigue in relation to continuous intermittent low-frequency stimulation. Twenty-two adult male Wistar ST rats were randomly assigned into the constant frequency stimulation (CFS) group or the catchlike-inducing stimulation (CIS) group. In the CFS group, constant low-frequency stimulation of 20 Hz was applied intermittently (4 seconds "ON"/15 seconds "OFF"). In the CIS group, a single electrical burst of 100 Hz was applied at the start of the every 4-second period of stimulation. The muscle fatigue test lasted for 16 min and isometric muscle force, muscle fatigue, and muscular workload were evaluated. CIS significantly increased the maximum muscular force (under fatigued condition) and workload, and significantly decreased muscle fatigue (p < 0.05). The results of this study suggest that catchlike-inducing intermittent electrical stimulation is useful in the clinical administration of functional electrical stimulation.
捕捉样特性是指在持续低频刺激基础上叠加短暂高频脉冲串时所产生的力量增强。在功能性电刺激中，约20Hz的持续低频刺激主要用于减轻肌肉疲劳。本研究的目的是探究诱捕样间歇性刺激对肌肉疲劳的影响，并与持续间歇性低频刺激进行比较。将22只成年雄性Wistar ST大鼠随机分为恒频刺激（CFS）组或诱捕样诱导刺激（CIS）组。在CFS组中，以20Hz的恒频进行间歇性刺激（4秒“开”/15秒“关”）。在CIS组中，在每4秒刺激期开始时施加一次100Hz的单个电脉冲串。肌肉疲劳测试持续16分钟，评估等长肌力、肌肉疲劳和肌肉工作量。CIS显著增加了（疲劳状态下的）最大肌肉力量和工作量，并显著降低了肌肉疲劳（p<0.05）。本研究结果表明，诱捕样诱导的间歇性电刺激在功能性电刺激的临床应用中是有用的。
