Synovial Membrane of Articular Capsule of Humeroulnar Joint
Membrana synovialis capsulae articularis articulationis humeroulnaris
Read moreAnatomical Relations
The synovial membrane of the humeroulnar joint forms the internal layer of the articular capsule of the humeroulnar joint. The fibrous membrane forms the external layer of the capsule. The synovial membrane also extends from the articular margins of the distal end of the humerus and covers the olecranon, ulnar, and radial fossae, and the medial surface of the trochlea.
Structure
The synovial membrane of the humeroulnar joint lines the joint cavity and is composed of loose connective tissue. The synovial membrane is responsible for producing synovial fluid, which lubricates the humeroulnar joint.
Function
The articular capsule of the humeroulnar joint ensures that the joint is sealed, thus, keeping the lubricating synovial fluid within the joint. It provides passive stability to the joint by limiting the joint movement. Additionally, it provides active stability but containing numerous proprioceptive nerve endings which relay mechanical information back to the central nervous system (Ralphs and Benjamin, 1994).
References
Ralphs, J. R. and Benjamin, M. (1994) 'The joint capsule: structure, composition, ageing and disease', Journal of Anatomy, 184(Pt 3), pp. 503-509.
