肌桥内肌纤维相对长度及截面积的差异对缺损神经再生的影响

The Influence of the Relative Length and Transverse area of Muscle Fiber in the Muscle Bridge on the Nerve Regeneration

目的 :探求较理想的肌桥。方法 :对取材于犬的不同部位的肌桥内肌纤维相对长度和截面积进行镜下观测及桥接缺损神经的实验观察。结果 :缝匠肌的肌条内肌纤维与肌条长轴平行并且多与肌条等长 ;指浅屈肌肌纤维走向与肌条长轴夹角较大而且不与肌条等长。不同肌条的肌纤维截面积有很大差异 ,其中肌纤维走向与肌条长轴夹角较大的肌纤维的截面积也较大。由相对长度较大的肌纤维为主要构成的肌桥缝接缺损神经的再生效果较好。结论

Observed and measured the relative length and transverse area of muscle fiber in the muscle bridge from the sartorius and flexor digitorum superficialis of dogs by dissection under the stereoscope and image analysis methods,and med the experiment that the muscle bridge from sartorius and flexor digitorum superficialis are sewed to defect nerve.Results:The most of muscle fiber in sartorius parallel the longitudinal axis of muscle bridge,and equal the length of the muscle bridge. The other muscle bridge in our experiment are different from sartorius,although the muscle bridge is cut longitudinally along the muscle margin. There are obvious difference among the transverse area of the muscle fiber in those muscle bridges. The larger the angle between the direction of the muscle fiber and the longitudinal axis of the muscle bridge is,the larger the transverse area of the muscle fiber in the muscle bridge is. Nerve regeneration sewed by the muscle bridge from the caudal portion of sartorius is bettter than one sewed by muscle bridge from flexor digitorum superficialis.Conclusion:There is a larger effect on the nerve regeneration of nerve defect in animal.Because of the variety in the relative length of the muscle fiber in the muscle bridge. The difference maybe help to explain the variety in the clinical effect of muscle bridge.