Objective:To understand the contribution of the 4 muscles of the quadriceps femoris, and to provide a theoretical basis for clinical treatment of instability of the patellofemoral joint.

• 目的:了解组成股四头肌的4块肌在维持髌骨稳定性中的作用,为临床治疗髌股关节不稳提供理论依据。