Elizabeth Bruyere Hospital 1 article published in JoVE Medicine Using a Knee Arthrometer to Evaluate Tissue-specific Contributions to Knee Flexion Contracture in the Rat T. Mark Campbell1,2,3, Katherine Reilly2,3, Louis Goudreau4, Odette Laneuville2,5, Hans Uhthoff2,3, Guy Trudel2,3,4 1Elizabeth Bruyère Hospital, 2The Bone and Joint Research Laboratory, University of Ottawa, 3Department of Medicine, University of Ottawa, 4The Ottawa Hospital Rehabilitation Centre, 5Department of Biology, University of Ottawa The goal of the protocol is to measure the extension range of motion of the rat knee. The effects of various diseases that increase the stiffness of the knee joint and the effectiveness of treatments can be quantified.