The Q angle, or quadriceps angle, is often measured when a physician is examining and evaluating a patient for knee pain. This angle is an important indicator of the biomechanical forces that act on the knee.


The Q angle is formed between two lines representing pulling forces on the knee. The first line is the longitudinal axis of the femur (thigh bone), which represents the line of pull of the quadriceps muscles on the knee. This line is created by measuring from the center of the patella (kneecap) ...

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