人前臂肌群的构筑学研究  

A Study on the Architecture of the Human Forearm Muscles

作　　者：李志义[1] 薛黔[1] 徐凤生 

机构地区：[1]遵义医学院解剖教研室,遵义563003 [2]黔东南卫校解剖教研室,凯里556000

出　　处：《四川解剖学杂志》1998年第2期79-82,共4页Sichuan Journal of Anatomy

基　　金：国家自然科学基金;贵州省科委95攻关项目

摘　　要：研究了甲醛固定的成年男性尸体5具（10侧）前臂肌群的构筑学特性。结果表明：前臂肌均为羽肌和半羽肌，羽状角5．4°～16．3°之间。在腕屈伸肌系统中，腕的屈肌和伸肌的生理横切面积（CSA）分别为13．54cm2和14．82cm2,这表明腕的屈肌和仲肌的肌力配布相当。在指屈伸肌系统中，指的屈肌和伸肌的CSA分别为25．82cm2和7．68cm2，屈肌是伸肌的3倍多，表明手指的屈肌力量明显高于伸肌。根据构筑特性分析，前臂各肌肌纤维的肌节长度明显不同，范围在2．07～2．77um，其中屈肌的肌节长度平均为2．32um，伸肌的肌节长度平均为2．60um．伸肌明显高于屈肌，这提示伸肌的缩短速度和位移幅度明显比屈肌大。本文对肌构筑与肌功能的关系作了讨论。The architectural features of the forearm muscles were studied in 5（10 sides） adult cadavers． The results showed that the forearm muscles were all pennate or semipennate muscles and their pennate angles were between 5．4～16． 3°． The average physilogical cross-seetional areas（CSA） of the flexors and the extensors of the wrist were 13． 54cm2 and 14． 82cm2 respectively，and it showed that the force production of the flexors and the extensors of the wrist was balanceble． However the CSA of the flexsors and the extensors of the fingers were 25． 82cm2 and 7． 68cm2 respectively， and the CSA of the flexsors was more than 3 times of the extensors． It showed that the force production of the finger flexsors were higher than that of the finger extensors． According to the analysis on their architectural features， the sarcomere lenth of different forearm muscles was significantly different and between 2．07～2．77um． The average sarcomere lenth of the extensors（2． 60um） was significantly longer than that of the flexsors（2． 32um）． This result indicated that the shortening velosity and displacement range of the extensors were remarkbly larger than that of the flexsors． The re-lation between the architectural features and the function of these muscles was discussed．

关 键 词：前臂肌 肌构筑 肌节 人 

分 类 号：R322.74[医药卫生—人体解剖和组织胚胎学]