Nelson R M, Cauley T, Fink M, Lauretani C, Simonson T
Physical Therapy Program, Lebanon Valley College, Annville, PA, USA.
Electromyogr Clin Neurophysiol. 2003 Jan-Feb;43(1):17-22.
This study examined specific electrical characteristics of voluntary single motor unit action potentials (SMUAPs): amplitude, duration, phase change, and rate of rise. These characteristics, which were detected from two intrinsic muscles of the hand--the abductor pollicis brevis and the abductor digiti minimi--were compared to hand dominance. Forty subjects participated in the study. Five characteristics were detected from each muscle using the quadrant technique while the subject produced a minimal isometric contraction. Based on results of an ANOVA [two-factor with replication] test, our study revealed no significant difference between muscles in the dominant and non-dominant hands. Descriptive statistics for each muscle characteristic are presented. This study has identified parameters for SMUAP characteristics detected in non-impaired individuals ranging in age from 20 to 43 years. The normative parameters serve as a valuable base from which one may examine potential neuronal damage from cumulative trauma disorders.
本研究检测了自主单运动单位动作电位（SMUAPs）的特定电特性：幅度、持续时间、相位变化和上升速率。从手部两块固有肌——拇短展肌和小指展肌——检测到的这些特性，与手的优势情况进行了比较。40名受试者参与了该研究。当受试者进行最小等长收缩时，使用象限技术从每块肌肉检测到五种特性。基于方差分析[有重复的双因素]测试结果，我们的研究表明优势手和非优势手的肌肉之间没有显著差异。给出了每种肌肉特性的描述性统计数据。本研究确定了年龄在20至43岁的未受损个体中检测到的SMUAP特性参数。这些规范参数是一个有价值的基础，据此可以检查累积性创伤障碍导致的潜在神经元损伤。
