Related Experiment Video
Updated: Aug 9, 2026

Using a Knee Arthrometer to Evaluate Tissue-specific Contributions to Knee Flexion Contracture in the Rat
Published on: November 9, 2018
Joint effusions and flexion deformities
Abstract:
The etiology of flexion deformities was studied experimentally on infant and adult cadavers. The experiment was performed on all major joints, which were first filled with liquid under tension and later connected to a manometer. The influence of joint position on the intra-articular pressure was then carefully noted. It was consistently observed that the position of least pressure was always a position of slight flexion. It was therefore concluded that the occurrence of flexion deformities in the presence of effusion is due to maintenance of the position of comfort, since it is in this position that periarticular structures are under least pressure.
More Related Videos
Related Concept Videos
Structural Joints: Cartilaginous Joints
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary or...
Structural Joints: Synovial Joints
Knee Joint
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris group...
Ankle Joint
Development of the Limb Synovial Joints
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
Pleural Effusion I: Introduction
There are two main types of pleural effusion: transudative and exudative. They are differentiated using Light's criteria,...

