十字韧带:膝关节内有前、后十字韧带,前十字韧带起自胫骨踝间隆起的前方、向后、上、外止于股骨外踝的内面;后十字韧带起自胫骨踝间隆起的后方,向前、上、内止于股骨内踝的外面,膝关节不论伸直或屈曲,前后十字韧带均呈现紧张状态,前十字韧带可以防止胫骨向前移动,后十字韧带可以防止胫骨向后移动。十字韧带损伤普遍均由暴力使膝关节过伸或过度外展引起,外力从前后加于股 Cruciate ligament: knee anterior and posterior cruciate ligament, anterior cruciate ligament from the ankle raised in front of the tibia, backward, upper and lower ends in the medial femoral malleolus; posterior cruciate ligament from the ankle raised rear, Forward, on the inside of the femoral medial malleolus outside the knee regardless of straightening or flexion, anterior cruciate ligament showed tension, the anterior cruciate ligament can prevent the tibia move forward, the posterior cruciate ligament can prevent the tibia to move backward. Cruciate ligament damage are generally caused by violence to the knee hyperextension or over-expansion caused by the external force from before and after the addition of shares