摘要
目的 探讨具有亚部结构的家兔小腿三头肌的肌构筑特点。方法 肌构筑测量方法进行定量分析。结果 家兔小腿三头肌均为羽状肌 ,腓肠肌外侧头的生理横切面积 (3.97cm2 )分别是腓肠肌内侧头 (2 .5 9cm2 )和比目鱼肌 (1.4 1cm2 )的 1.5倍和 2 .8倍。外侧头的 3个亚部中 ,外侧亚部的生理横切面积与肌重的比值显著大于其余二个亚部 (P <0 .0 5 ) ;而内侧亚部的肌纤维长与生理横切面积的比值显著高于其余两亚部 (P <0 .0 5 )。在小腿三头肌中 ,腓肠肌内侧头的肌纤维长与生理横切面积的比值 (0 .4 4 )最小 ,比目鱼肌的肌纤维长最短 (0 .85cm)。结论 腓肠肌外侧头进一步存在功能分工 ,外侧亚部以产生力量为主 ;而内侧亚部以发挥速度为主。腓肠肌内侧头属力量型肌 ,主要是维持膝在静力和动力状态下的稳定性。
Objective To investigate the architecture feature of the rabbit triceps surae which had compartment structure. Methods Muscle architecture measure method. Results The triceps surae were all pinnated muscles. The cross sectional area of the lateral gastrocnemius (LG,3.97cm 2) was 1.5 times and 2.8 times to that of medial gastrocnemius(MG, 2.59cm 2)and soleus(SOL,1.41cm 2)respectively .In three compartments of LG, the physiological cross sectional area/muscle weight (CSA/MW)ratio of the laterial compartment of LG (LGl) was more larger than other two compartments(P<0.05); while the fiber length/physiological cross sectional area (FL/CSA) ratio of medial compartment of LG(LGm) was more larger than other two compartments(P<0.05).In triceps surae the Medial gastrocnemius(MG) had the smallest FL/CSA ratio (0.44); while the SOL had the shorest fiber length (0.85cm). Conclusions Three compartments of LG had different funcation. LGl was designed mainly for greater tension production; while LGm was for greater velocity, MG was also designed for tension production, it's function was likely to maintain the stability of the knee in both stable or dynamic conditions. The funcation of SOL in rabbit is not significant.[
出处
《合肥医学院学报》
2002年第6期492-494,共3页
Journal of Zunyi Medical University
关键词
肌构筑
肌亚部
小腿三头肌
家兔
muscle architecture
neuromuscular compartment
triceps surae
rabbit
