人大腿肌构筑学研究

STUDY on ARCHITECTURE of the HUMAN THIGH MUSCLES

对12侧人大腿肌的构筑研究表明，股四头肌的生理横切面积是臀大肌或腓肠肌的3倍。伸膝肌远较屈膝肌强大是人类骨骼肌的特征之一。绳肌中，股二头肌长头和半膜肌提供主要肌力，股二头肌短头和半腱肌都是速度型肌，分别对前者的力度和方向进行调节。内收肌群各肌的肌纤维长度、羽状角自上而下逐渐增大，适应干下肢以髋关节为中心的收、展运动，也表现为强化髋和膝的稳定性。本文测定了大腿各肌在解剖方位下的肌节长。

Architectural investigation in twelve sides of the human thigh muscles indicates that,the cross-sectional area of the quadriceps femoris is three folds as big as the gluteus maximus and also the gastrocnemius.The knee extensors being much stronger than the flexors is one of the characters of the human skeletal muscles.In hamstring,the long head of the biceps femoris and the semimembranosus are the main source of force production,while the short head of biceps femoris and the semitendinosus tend to rapid displacement,and probably play the role of regulating the direction and force of the former,The fiber length and pennate an gle of the adductor muscle group become longer and greater from upper downwards,which is considered that,it expresses an adaptation for the stabilization of the hip and knee joints and for the movement of the thigh with its centre on the head of femur.On this paper,the sar comere length of the thigh muscles in anatomical position is also measured.