Fibrous Layer of Articular Capsule of Distal Radioulnar Joint
Stratum fibrosum capsulae articularis articulationis radioulnararis
Read moreAnatomical Relations
The fibrous layer of the articular capsule of the distal radioulnar joint forms the external layer of the articular capsule of the distal radioulnar joint. The synovial membrane forms the internal layer of the capsule. The fibrous membrane is more lax proximally.
Structure
The fibrous layer of the articular capsule of the distal radioulnar joint is composed of dense fibrous tissue and is thinker anteriorly and posteriorly.
Function
The articular capsule of the distal radioulnar 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.
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Radioulnar Joint
The distal radioulnar joint is a diarthrodial articulation between the ulnar head and the sigmoid notch of the distal radius that permits forearm pronation and supination.
