Fig. 4

Patellofemoral grind test is used to determine patellofemoral syndrome. To perform this test, have the patient lie supine with the knee extended. Place the web space of your thumb on the superior border of the patient’s patella. Have the patient contract their quadriceps muscle while applying downward and inferior pressure on the patella. A positive test is signaled by pain with movement of the patella or an inability to complete the test