An orthopedic physical examination test with the patient on his or her back, the thigh and knee are flexed and one ankle is placed over the       opposite knee; the knee is depressed, and if pain is produced thereby, arthritis of the hip, psoas muscle or SI joint is indicated. The name comes from the initial letters of movements that are necessary to perform it, namely, flexion, abduction, external rotation, extension. Also called Patrick’s Sign.