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Articular Capsules of Proximal Interphalangeal Joints of Foot
Connective Tissue

Articular Capsules of Proximal Interphalangeal Joints of Foot

Capsulae articulares articulationum interphalangearum proximalium pedis

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Structure

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.

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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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