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家兔胫骨前肌肌纤维型的分布研究
引用本文:朱道立,张艳红,程量.家兔胫骨前肌肌纤维型的分布研究[J].中国实验动物学报,1995(2).
作者姓名:朱道立  张艳红  程量
作者单位:江苏省南通师专生物系
摘    要:根据家兔胫骨前肌的肌纤维起止、排列和神经支配特征,将该肌分为前、后两个亚体。利用家兔8例16侧胫骨前肌,按上述两个亚体分别取材,作恒冷箱冰冻横切,肌球蛋白ATP酶染色,将肌纤维分为Ⅰ型、ⅡA型、ⅡB型,检测各亚体的肌纤维型构成比例,肌束内肌纤维的分布特征,并用图象分析仪测量各亚体肌纤维横切面积和直径。结果发现,前、后亚体以Ⅱ型纤维居多,前亚体ⅡA型纤维高达35.4%,后亚体Ⅰ型纤维多达24.5%,两者的ⅡB型纤维均达50%左右。而左、右侧之间无差异,肌束周边部内Ⅰ型纤维仅占12.7~13.3%,ⅡB型纤维高达59.9~60.0%,说明受肌束膜压迫影响,ⅡB型肌纤维血供少,以适应无氧酵解的功能。各亚体的Ⅰ型纤维较细,Ⅱ型纤维较Ⅱ粗,A型与ⅡB型二者相似。作者认为,前亚体主要参与快速有力的足背屈运动,后亚体则维持踝关节的稳定,保持足弓的形状和弹性,以便适应该肌的站立、跑动和跳跃的功能。

关 键 词:家兔,胫骨前肌,肌亚体,肌纤维型,肌球蛋白ATP,酶

Study on the Distribution of Muscle Fiber Types ofTibialis Anterior Muscles in Rabbit
Zhu Daoli,et al.Study on the Distribution of Muscle Fiber Types ofTibialis Anterior Muscles in Rabbit[J].Acta Laboratorium Animalis Scientia Sinica,1995(2).
Authors:Zhu Daoli  
Abstract:he tibialis anterior muscles on both side of 8 rabbits were studied.According to its fiber architecture, origins. insertion and nerve dis-tribution, the tibialis anterior muscles was divided into two subvolumes :an anterior and a posterior. The muscle samples were taken respectivelyfrom each subvolumes of the tibialis anterior muscles. Frozen transversesections were stained for myosin ATPase. Muscle fibers were identifiedas type , type A and type B. The proportion of fiber types in eachportion and the distributive features in fascicule were calculated on mic-roscopic photographs. Mean cross-sectional areas and mean cross-sectionaldiarneters or three types were measured by imaging analytical system.Theresults showed a remarkably high proportion of type fibers in both theanterior and posterior subvolumes. The type A fibers in anterior subvo-lume comprise about 35.4%, and the type I fibers in posterior subvolumecomprise bout 24.5q% the average occurrence of type B fibers is about50% in both subvolumes, however no difference was found between the leftand right sides. The peripheral part of the fascicule contains 12.7-13.3q%type I fiber and type fiber 59.9-60.0% respectively. The fiber sizebetween type A and type B is similar, but type I fiber is smaller thantype fiber in all portions. The authors suggest that anterior subvolumeas designed to take part in the velocity and dorsiflexion of the foot andthat the posterior subvolume as designed only to stabilize the ankle and tomainta in the arches of foot during standing , running andjumping.
Keywords:Rabbit Tibialis anterior muscle Muscle subvolumeMuscle fiber type Myosin ATPase  
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