小腿肌的肌纤维型分布  

DISTRIBUTION OF MYOFIBER TYPES IN LEG MUSCLES

作　　者：应福其[1] 刘绍壮[1] 李名扬 马晓凯[1] 宫谨 王荣新[1] 

机构地区：[1]大连医科大学解剖学教研室,大连116023

出　　处：《解剖学杂志》1997年第6期532-535,共4页Chinese Journal of Anatomy

摘　　要：为探讨小腿肌的肌纤维型分布特征和构成比例,取5例(男2、女3)19～60岁死后12小时内的人体两侧小腿肌共140块,用肌球蛋白ATP酶法,系统地研究了小腿各肌的肌纤维型分布.结果表明:人类小腿肌Ⅰ型(慢缩)纤维的平均百分率在56%～80%之间.从总体看,小腿肌中Ⅰ型纤维(总平均百分率为65.2%)占优势.其中小腿前群Ⅰ型纤维占68.4%,后群占62.5%,外侧群占59.9%.前群的慢缩纤维高于外侧群和后群,前者与后两者间存在显著差异(P<0.01、P<0.05).在后群和外侧群中,浅、深层肌间Ⅰ型纤维百分率浅层肌明显高于深层肌.在外侧群,腓骨长肌的Ⅰ型纤维百分率为63.6%,腓骨短肌为56.2%,两者间差异显著(P<0.01),后群浅层的小腿三头肌Ⅰ型纤维占68.4%,深层三块肌为58.7%,两者间差异显著(P<0.01).女性腓骨长肌、趾长伸肌的第2、3趾肌腹的Ⅰ型纤维百分率显著高于男性.In the present study, the composition and the distribution of leg muscle fiber types were ex-amined. Samples of muscles of 140 legs were taken from 5 cadavers (2 males, 3 females) at the age of 19-60 without any neuromuscular disease. The fibers of leg muscles were divided into Type I and II by myosin ATPase histochemical method. The results showed that the mean per-centage of Type I fibers of the leg muscles was 65. 2%(56% - 80%). In the anterior group the mean percentage of Type I fibers was 68. 4%, in the posterior and the lateral groups was 62. 5% and 59. 9% respectively. The slow twitiching fibers were predominant. The proportion of slow twitiching fibers of the anterior group was higher than that of the posterior and the lateral groups and showed significant differences (P<0. 01 and P<0. 05). The percentage of Type I fibers in the superficial layers of the posterior (68. 4%) and the lateral groups (63. 6%) was higher than that in the deep layers (58. 7% and 56. 2% respectively), with significant difference of P<0. 01. There was no apparent sexual difference of Type I fibers in the human muscles of the leg, except in the 2nd and 3rd of the extensor digitorum longus and the peroneus longus, which contained a higher proportion of Type I fibers in females.

关 键 词：胫骨前肌 趾长伸肌 腓骨长肌 小腿三头肌 解剖学 

分 类 号：R322.74[医药卫生—人体解剖和组织胚胎学]