The Q angle is defined as the angle formed by lines drawn from which points?

The Q angle is defined as the angle formed by lines drawn from which points?

• A. The quadriceps tendon and patellar tendon
• B. ASIS to patella and patella to tibial tuberosity
• C. The patellar tendon and the tibial tuberosity
• D. The center of patella and the tibial tuberosity

Answer: (B)

The Q angle reflects how the line of pull from the thigh muscles aligns with the knee by using two landmarks that bracket the patella: the anterior superior iliac spine (hip) and the tibial tuberosity (shin). One line runs from the ASIS to the center of the patella, and the other runs from the patellar center to the tibial tuberosity. The angle formed between these two lines at the patella is the Q angle. This setup directly shows how hip-to-tibia alignment influences patellar tracking and lateral pull. The described construction matches the option using ASIS to the patella and the patella to the tibial tuberosity, making it the correct choice. The other options involve different tendons or miss the hip landmark, so they don’t define the Q angle.

The Q angle reflects how the line of pull from the thigh muscles aligns with the knee by using two landmarks that bracket the patella: the anterior superior iliac spine (hip) and the tibial tuberosity (shin). One line runs from the ASIS to the center of the patella, and the other runs from the patellar center to the tibial tuberosity. The angle formed between these two lines at the patella is the Q angle. This setup directly shows how hip-to-tibia alignment influences patellar tracking and lateral pull. The described construction matches the option using ASIS to the patella and the patella to the tibial tuberosity, making it the correct choice. The other options involve different tendons or miss the hip landmark, so they don’t define the Q angle.