Ohkoshi Y, Yasuda K, Kaneda K, Wada T, Yamanaka M
Department of Orthopaedic Surgery, Hokkaido University School of Medicine, Sapporo, Japan.
Am J Sports Med. 1991 Nov-Dec;19(6):605-11. doi: 10.1177/036354659101900609.
Biomechanical analysis of the two-dimensional models composed from roentgenographic pictures and electromyographic analysis of the shear force exerted on the tibia during standing on both legs were conducted in 21 young adult males. The simultaneous contraction of the quadriceps and hamstrings was observed in all electromyograms. Amplitude observed on electromyograms of the hamstrings increased as the trunk flexion angle increased. The calculated average values of shear force were negative at every knee flexion angle (negative value means posteriorly directed force). As the trunk flexion angle increased, posterior drawer force increased at knee flexion angles of 30 degrees and 60 degrees. The simultaneous contraction of the quadriceps and the hamstrings was considered to be the main factor that influenced these results. Standing on both legs with knee and trunk flexion was considered to be applicable in the early stages after anterior cruciate ligament reconstruction.
对21名年轻成年男性进行了由X线片组成的二维模型的生物力学分析以及双腿站立时胫骨所受剪切力的肌电图分析。在所有肌电图中均观察到股四头肌和腘绳肌同时收缩。随着躯干屈曲角度增加，腘绳肌肌电图上观察到的振幅增大。在每个膝关节屈曲角度下，计算得出的剪切力平均值均为负值（负值表示向后的力）。随着躯干屈曲角度增加，在膝关节屈曲30度和60度时后抽屉力增大。股四头肌和腘绳肌的同时收缩被认为是影响这些结果的主要因素。双腿屈膝和躯干屈曲站立被认为适用于前交叉韧带重建后的早期阶段。
