Yasumoto Sawa, Mitsudome Akihisa
Department of Pediatrics, School of Medicine, Fukuoka University, 7-45-1, Nanakuma, Jonan-ku, Fukuoka, Japan.
Brain Dev. 2004 Jan;26(1):8-11. doi: 10.1016/s0387-7604(03)00070-6.
We analyzed characteristics of F-waves in neonates to establish normal parameters for this age. F-waves recorded from the median nerve in 26 normal neonates were analyzed and compared to those in 10 adults. F-wave parameters measured included occurrence rate (Fpersistence), latency (Flatency), latency corrected for subject height (normalized Flatency), duration (Fduration), amplitude (Famplitude) and its ratio to M-wave amplitude (F/M ratio), F-wave conduction velocity (FCV), and Fchronodispersion. Mean Fpersistence in neonates was 100%. Famplitude and the F/M ratio were higher in neonates than in adults. Similar F-wave waveforms were observed repeatedly in neonates, while waveforms varied in adults. These results in neonates suggest increased excitability of motor neurons in the spinal anterior horn reflecting immaturity of inhibition by the central nervous system.
我们分析了新生儿F波的特征，以建立该年龄段的正常参数。对26例正常新生儿正中神经记录的F波进行了分析，并与10例成年人的F波进行了比较。测量的F波参数包括出现率（F波持续率）、潜伏期（F波潜伏期）、根据受试者身高校正的潜伏期（标准化F波潜伏期）、时限（F波时限）、波幅（F波波幅）及其与M波波幅的比值（F/M比值）、F波传导速度（F波CV）和F波时间离散度。新生儿的平均F波持续率为100%。新生儿的F波波幅和F/M比值高于成年人。在新生儿中反复观察到相似的F波波形，而成年人的波形则有所不同。新生儿的这些结果表明脊髓前角运动神经元的兴奋性增加，反映了中枢神经系统抑制功能的不成熟。
