The Q angle, which is also known as quadriceps angle, is defined as the angle formed between the quadriceps muscles and the patella tendon. … Moreover, Q angle has become accepted as an important factor in assessing knee joint function and determining knee health in individuals suffering from an anterior knee pain [2–4].

What is the Q angle in anatomy?

The Q-angle is the angle formed by the intersection of lines drawn from the anterior superior iliac spine to the center of the patella and from the center of the patella to the tibial tubercle (Fig. 56.8). … The reported values of normal Q-angles are 10 degrees for men and 15 degrees for women.

What does a high Q angle mean?

A high Q angle means mal-tracking of the patella is likely. As a result it does not travel over the front of the knee joint as it should. Over time this causes microtrauma to the cartilage on the rear of the patella.