Robichaud J A, Agostinucci J, Vander Linden D W
University of Florida, Physical Therapy Department, Gainesville 32610.
Phys Ther. 1992 Mar;72(3):176-83; discussion 183-5. doi: 10.1093/ptj/72.3.176.
We investigated the effect of air-splint pressure on soleus muscle motoneuron reflex excitability in 18 nondisabled subjects with no history of neurological disease and 8 subjects with cerebrovascular accidents (CVAs). Motoneuron reflex excitability was assessed by measuring the percentage of amplitude (peak-to-peak measurement) change in the Hoffman reflex (H-reflex). Pressure was applied for 5 minutes, after which the air-splint was deflated. Ten H-reflexes were recorded and averaged for each subject before pressure application to obtain a baseline value. H-reflexes were also recorded at set intervals during and after pressure application. Two-way analyses of variance for repeated measures were used to compare each group's pressure and postpressure measurements with the baseline value. Significant F tests were followed by post hoc t tests. Analyses of variance were used to compare the nondisabled subjects' H-reflex recordings with those obtained for the subjects with CVAs. The nondisabled subjects demonstrated reductions of 55% at 1 minute, 52% at 3 minutes, and 40% at the fifth minute of pressure application. The postpressure measurements showed increases in the reflex amplitude at 1 and 3 minutes postpressure; however, by the fifth minute, the amplitude was not different from the baseline value. The subjects with CVAs demonstrated reductions of 41% at 1 minute, 48% at 3 minutes, and 52% at 5 minutes of pressure application. None of the postpressure measurements, however, were statistically different from the baseline value. A statistically significant difference was demonstrated between the nondisabled subjects and the subjects with CVAs at the first minute of pressure release.(ABSTRACT TRUNCATED AT 250 WORDS)
我们研究了空气夹板压力对18名无神经疾病病史的非残疾受试者和8名脑血管意外（CVA）受试者比目鱼肌运动神经元反射兴奋性的影响。通过测量霍夫曼反射（H反射）的幅度变化百分比（峰峰值测量）来评估运动神经元反射兴奋性。施加压力5分钟，之后给空气夹板放气。在施加压力前，为每个受试者记录并平均10次H反射以获得基线值。在施加压力期间和之后的设定间隔也记录H反射。采用重复测量的双向方差分析来比较每组的压力和压力后测量值与基线值。显著的F检验之后进行事后t检验。方差分析用于比较非残疾受试者的H反射记录与CVA受试者的记录。非残疾受试者在施加压力的第1分钟、第3分钟和第5分钟分别降低了55%、52%和40%。压力后测量显示在压力后1分钟和3分钟反射幅度增加；然而，到第5分钟时，幅度与基线值无差异。CVA受试者在施加压力的第1分钟、第3分钟和第5分钟分别降低了41%、48%和52%。然而，压力后测量值与基线值均无统计学差异。在压力释放的第1分钟，非残疾受试者和CVA受试者之间存在统计学显著差异。（摘要截短为250字）
