足肌的肌纤维型分布特征及构成比例研究  

Distribution of myofiber types in foot muscles

作　　者：应凯[1] 陈要武[2] 刘绍壮[2] 应福其[2] 马晓凯[2] 宫瑾[2] 

机构地区：[1]大连市第二人民医院骨外科,辽宁大连116013 [2]大连医科大学解剖学教研室,辽宁大连116044

出　　处：《大连医科大学学报》2008年第3期213-217,226,共6页Journal of Dalian Medical University

摘　　要：[目的]探讨足肌的肌纤维型分布特征和构成比例,对足肌功能和病理学研究提供形态学依据。[方法]取4例25-30岁（均死于非神经肌性疾病）死后12 h内的人尸两侧足肌共160块,用肌球蛋白ATP酶法,系统地研究了足部各肌的肌纤维分型、测定和统计各肌Ⅰ型（慢缩）、Ⅱ型（快缩）肌纤维的构成比例。[结果]（1）足肌Ⅰ型纤维的平均百分率为43%-59%（总平均为50.1%）。其中足背肌Ⅰ型纤维的平均百分率为48.6%,足底肌为51.5%。足底肌分三群,内侧群Ⅰ型纤维的平均百分率为55.1%,外侧群为51.5%,中间群为50.3%。在中间群内,浅层肌的Ⅰ型纤维平均百分率为56.8%,深层肌为45.4%。（2）足背肌与足底肌间Ⅰ型纤维的平均百分率差异无显著性意义（P〉0.05）。但和趾的短屈肌与短伸肌之间的Ⅰ型纤维的平均百分率短屈肌均高于短伸肌,两者间差异有显著性意义（P〈0.05）。（3）足底肌中,内侧肌群的Ⅰ型纤维平均百分率高于中间群,两者间差异有显著性意义（P〈0.05）。在中间群内,浅层肌的Ⅰ型纤维平均百分率高于深层肌,在统计学上两者差异有显著性意义（P〈0.01）。（4）左、右侧比较,Ⅰ型纤维的平均百分率差异无显著性意义（P〉0.05）。[结论]本研究为国人肌纤维型研究提供了基础资料。[ Objective] To provide morphological data about the fiber types of the foot muscles for further functional and pathological investigations. [ Methods ] One hundred and sixty Samples of foot muscles were obtained from 4 cadavers （ 3 males,1 female） at the age 25 -30 without neuromuscular diseases. By myosin ATPase histochemical method, fibers of the foot muscles may be divided in to Type Ⅰ （slow twitching） and Type Ⅱ （fast twitching）. [ Results ] （1）The mean percentage of type Ⅰ fibers of foot muscles were 43% - 59% （the total mean was 50.1% ）. In the muscles of the dorsum of foot the mean percentage of type Ⅰ fibers was 48.6%. The muscles of the sole were divided into three groups medial, lateral and intermediate. In medial group the mean percentage of Type Ⅰ fibers was 55.1% , in the lateral group was 51.5% ,and in the intermediate group was 50.3%. Among the intermediate group, the mean percentage of type Ⅰ fibers of superficial muscles was 56.8% ,the deep muscles was 45.4%. （2） Among them,the mean percentage of type Ⅰ fibers of muscles on the dorsum of foot were 48.6% ,on the sole of the foot were 51.5% ,there were no significant differences between them. But the differences of type Ⅰ fibers between flexor hallucis brevis,flexor digitorum brevis and extensor digitorum brevis were significant （ P 〈 0.05 ）. （3） Among all the muscles on plantar surface of foot,the mean percentage of type Ⅰ fibers in the medial group is higher than in the intermediate group （P 〈 0.05）. Among the intermediate group,the mean percentage of type Ⅰ fibers of superficial muscles was higher than that of deep muscles, and there was significant difference between superficial and deep muscles （ P 〈 0.05 ）. （4） There was apparent difference of type Ⅰ fibers between the right and the left sides of foot muscles. [ Condusion] This study prorvide a basic data for my ofiber types research.

关 键 词：肌纤维型分布 足肌 形态学 

分 类 号：R322[医药卫生—人体解剖和组织胚胎学]