Patellar Grind Test for Patellofemoral Syndrome The Patellar Grind Test assesses for Patellofemoral Syndrome. With the knee extended, push the patella into the trochlear groove of the femur. Pain is a positive test. Video via @open_michigan #Patellar #Grind #Test #Patellofemoral #Syndrome #knee #clinical #video #msk #sports #orthopedics #physicalexam