Articular Capsules of Proximal Interphalangeal Joints of Foot
Capsulae articulares articulationum interphalangearum proximalium pedis
Read moreStructure
The articular capsules of the interphalangeal joints are loosely attached to the articular margins of the bones. It is composed of two layers. The external layer, the fibrous membrane, is composed of dense fibrous tissue. The internal layer, the synovial membrane, lines the joint cavity and is composed of loose connective tissue.
Related parts of the anatomy
Anatomical Relations
The articular capsules of the interphalangeal joints are reinforced laterally and medially by the collateral ligaments, on its plantar aspect by the plantar ligaments, and dorsally by the extensor expansion.
Function
The articular capsule of the interphalangeal joints ensure 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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Proximal Interphalangeal Joint
The PIP joint is a ginglymus, hinged joint composed of the proximal phalanx, middle phalanx, and supporting soft tissue structures.
