Khosrawi Saeid, Vahdatpour Babak, Ahmadi Mehdi
Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
Adv Biomed Res. 2018 Apr 24;7:65. doi: 10.4103/abr.abr_106_17. eCollection 2018.
The aim of this study was to evaluate the relation between normal values of extensor digitorum communis (EDC) Hoffmann-reflex (H-reflex) latency, upper limb length and age in normal participants, and to determine whether there is any regression equation between them.
In this cross-sectional study, 120 upper limbs of 76 normal volunteers (55 limbs of 34 men and 65 limbs of 42 women) were participated in this study. The onset latency of EDC H-reflex was determined with standard electrodiagnostic techniques and was recorded.
The mean EDC H-reflex latency was 15.89 ± 1.41 ms. There was a positive significant correlation between EDC H-reflex latency and upper limb length ( = 0.749, < 0.0001) and also arm length ( = 0.758, < 0.0001), but there was a nonsignificant indirect correlation between age and EDC H-reflex latency ( = -0.111, = 0.227). The relation between H-reflex and sex was not statistically significant ( = 0.46).
According to our result, there are good predictive values between upper limb length and arm length for the estimation of normal EDC H-reflex latency.
本研究旨在评估正常受试者中，指总伸肌（EDC）霍夫曼反射（H反射）潜伏期的正常值、上肢长度与年龄之间的关系，并确定它们之间是否存在回归方程。
在这项横断面研究中，76名正常志愿者的120条上肢（34名男性的55条上肢和42名女性的65条上肢）参与了本研究。采用标准电诊断技术测定并记录EDC H反射的起始潜伏期。
EDC H反射潜伏期的平均值为15.89±1.41毫秒。EDC H反射潜伏期与上肢长度（r = 0.749，P < 0.0001）以及臂长（r = 0.758，P < 0.0001）之间存在显著正相关，但年龄与EDC H反射潜伏期之间存在不显著的间接相关（r = -0.111，P = 0.227）。H反射与性别之间的关系无统计学意义（P = 0.46）。
根据我们的结果，上肢长度和臂长对于估计正常EDC H反射潜伏期具有良好的预测价值。
