Mynark Richard G
Motor Control Laboratory, Department of Exercise and Sport Science, University of North Carolina, 305 Woollen, Chapel Hill, NC 27599, USA.
Clin Neurophysiol. 2005 Jun;116(6):1400-4. doi: 10.1016/j.clinph.2005.02.001. Epub 2005 Mar 28.
Many recent studies have used the soleus H-reflex methodology to examine age-related changes in neuromuscular function. However, reliability of the method has only been tested in young adults. The purpose of this study was to evaluate the inter-trial reliability of the soleus H-reflex in both young and elderly subjects during supine and standing conditions.
The experiment was carried out on 10 young and 10 elderly subjects. For each subject, 10 standardized soleus H-reflex trials were collected during each of the postural conditions. Intraclass correlations were calculated for the first 4, 6, 8, and 10 trials for each group at each body position.
The largest decreases in reliability in this study were observed with a decrease in the number of trials used to estimate the elderly soleus H-reflex during the standing condition. The change from using ten trials to using four trials led to an 8% decrease in reliability.
Due to the decreased postural control ability in the elderly population, at least ten trials should be used to estimate soleus H-reflex characteristics during standing or other functional weight-bearing conditions.
Using fewer than 10 trials could lead to an increase in statistical errors and misinterpretation of results.
最近许多研究采用比目鱼肌H反射方法来研究神经肌肉功能的年龄相关变化。然而，该方法的可靠性仅在年轻人中进行过测试。本研究的目的是评估年轻人和老年人在仰卧位和站立位时比目鱼肌H反射的试验间可靠性。
对10名年轻受试者和10名老年受试者进行了实验。对于每个受试者，在每种体位下收集10次标准化的比目鱼肌H反射试验。计算每组在每个身体位置的前4次、6次、8次和10次试验的组内相关系数。
在本研究中，观察到站立位时用于估计老年比目鱼肌H反射的试验次数减少，可靠性下降幅度最大。从使用10次试验改为使用4次试验导致可靠性下降8%。
由于老年人群姿势控制能力下降，在站立或其他功能性负重条件下，应至少使用10次试验来估计比目鱼肌H反射特征。
使用少于10次试验可能会导致统计误差增加和结果误判。
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