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目的:研究痉挛型瘫痪大鼠骨骼肌不同功能状态对其表面肌电特征性的影响。方法:选用健康5日龄新生wistar大鼠60只随机分为两组即:痉挛型瘫痪大鼠模型组和正常饲养组。复制痉挛型瘫痪大鼠模型成功后饲养30天,根据肌肉三种功能状态分为三组,分别为A组放松状态组、B向心性收缩状态组、C离心收缩状态组。每组包括痉挛型瘫痪大鼠10只,正常大鼠10只。检测工具采用Bio Trace+Software进行表面肌电的测试和分析;检测肌肉为伸膝肌群;检测指标为表面肌电均方根值(RMS);检测方式为电针刺激诱发不同收缩状态。结果采用SPSS17.0统计软件进行数据分析。结果:放松状态下痉挛大鼠RMS(2.76±0.09)v,正常大鼠RMS(2.82±0.07)v,独立样本的t检验P=0.126>0.05;向心性收缩状态痉挛大鼠RMS(10.25±0.35)v,正常大鼠RMS(11.07±0.81)v,独立样本的t检验P=0.012<0.05;离心性收缩状态痉挛大鼠RMS(3.32±0.27)v,正常大鼠RMS(4.0±3.045)v,独立样本的t检验P=0.001<0.05。结论:痉挛型骨骼肌收缩时肌纤维的募集异于正常骨骼肌,表面肌电对鉴别肌痉挛有效。
Objective: To study the effect of different functional states of skeletal muscle of spastic paralyzed rats on their EMG characteristic. Methods: Sixty healthy newborn Wistar rats aged 5 days were randomly divided into two groups: spastic paraplegia rat model group and normal feeding group. Sprague-Dawley rats were fed for 30 days after successful spastic paraplegia. The rats were divided into three groups according to the three functional states of muscle: relaxation group A, contractive group B, and eccentric contraction group C respectively. Each group includes 10 spastic paralyzed rats and 10 normal rats. The testing tool used Bio Trace + Software to test and analyze the surface electromyography. The muscle was measured as the extensor muscle group. The detection index was the surface myoelectric root mean square (RMS). The detection mode was electroacupuncture induced different contractions. Results SPSS17.0 statistical software for data analysis. Results: The spasm rat RMS (2.76 ± 0.09) v, normal rat RMS (2.82 ± 0.07) v and the independent sample t test P = 0.126> 0.05. The concentric contraction spastic rat RMS (10.25 ± 0.35 ) v, normal rat RMS (11.07 ± 0.81) v, independent sample t test P = 0.012 <0.05; eccentric contraction spastic rat RMS (3.32 ± 0.27) v, normal rat RMS T-test for independent samples P = 0.001 <0.05. Conclusion: Spasmodic skeletal muscle contraction muscle fiber recruitment is different from normal skeletal muscle, the surface of the myoelectricity to identify muscle spasms.