Liigesõõnsus

Liigesõõnsus refers to the space within a synovial joint that is filled with synovial fluid. This fluid lubricates the joint, reducing friction between the articulating bones and allowing for smooth movement. The synovial membrane, which lines the inner surface of the joint capsule, produces this viscous fluid. The quantity of synovial fluid can vary depending on the joint and its physiological state, increasing with inflammation for example.

The articular cartilage covers the ends of the bones within the joint cavity, providing a smooth, shock-absorbing surface. The integrity of the liigesõõnsus is crucial for normal joint function. Conditions affecting this space, such as osteoarthritis, rheumatoid arthritis, or joint effusions (excess fluid buildup), can lead to pain, stiffness, and limited mobility. Diagnostic procedures like arthrocentesis involve aspirating fluid from the liigesõõnsus to analyze its composition, aiding in the diagnosis of various joint pathologies. The pressure within the liigesõõnsus is also an important factor in joint mechanics and can be affected by factors such as muscle activity and body position.