bursae of the knee joint.

synovial bursae knee prepatellar infrapatellar suprapatellar pesanserinus semimembranosus popliteus subpopliteal medial lateral deep superficial inflammatory fluidfilled sheaths cushioning friction reduction protection movement anatomy physiology infection bursitis swelling pain management diagnosis treatment aspiration steroid injection ice rest elevation compression mobility rehabilitation flexibility function injuries pathology healing orthopedics medicine