Capsule of right knee-joint (distended). Posterior aspect. Skeletal components involved in the<unk>  include: patella, femur, tibia. No muscles are directly involved in this injury, only ligaments; However, strengthening the hip flexor and hip extensor muscles may help alleviate the injury. The medial collateral ligament, posterior cruciate ligament, anterior cruciate ligament, and lateral collateral ligament are the four primary ligaments of the knee. The medial and lateral collateral ligaments primarily provide support to varus and valgus forces whereas the anterior and posterior cruciate ligaments prevent anterior and posterior translation of the tibia on the femur. Structures in<unk>  Superior view of the structures in<unk> . The classic O'Donoghue<unk>  is characterized by an injury to three knee structures (in order): * the anterior cruciate ligament * the medial meniscus (however, lateral meniscus injuries are more commonly seen among athletes, leading to the definition of the O'Donoghue<unk>  most commonly used today.) * the medial collateral ligament (or "tibial collateral ligament")
Unhappy triad
Pectoriloquy
Fear of trains
Lordosis behavior
Listener fatigue
Lightning Strike
Psychodrama
Piquerism