Estudio anatómico y embriológico de la porción distal de la membrana interósea del antebrazo y su relación con otros estabilizadores de la articulación radioulnar distal
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2025
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21/05/2025
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Universidad Complutense de Madrid
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La membrana interósea del antebrazo (MIO) es un complejo ligamentoso robusto que conecta la ulna y el radio, contribuyendo junto a la articulación radioulnar distal (ARUD) a la estabilidad axial del antebrazo. Las lesiones de estas estructuras pueden alterar significativamente la transmisión de fuerzas. La ARUD se estabiliza principalmente por el complejo del fibrocartílago triangular (CFCT), aunque otras estructuras relacionadas con la MIO, como la Banda Oblicua Distal (BOD), actúan como estabilizadores secundarios. El desarrollo embriológico de la MIO no está bien caracterizado. Las articulaciones se forman por represión de la condrogénesis, seguida de la formación de cavidades articulares. En la semana 12, las estructuras estabilizadoras de la ARUD, incluidos ligamentos colaterales, radiocarpianos y el futuro disco del CFCT, ya están visibles.La zona distal incluye la BOD, presente en el 40% de la población, que se origina en el 1/6 distal de la diáfisis ulnar insertándose en el reborde sigmoideo radial distalmente. La BOD es un estabilizador secundario durante la pronosupinación, especialmente cuando los ligamentos del CFCT están dañados...
The interosseous membrane of the forearm (IOM) is a robust ligamentous complex connecting the ulna and radius, contributing along with the distal radioulnar joint (DRUJ) to the axial stability of the forearm. Injuries to these structures can significantly disrupt force transmission. The DRUJ is primarily stabilized by the triangular fibrocartilage complex (TFCC), although other structures related to the IOM, such as the Distal Oblique Band (DOB), serve as secondary stabilizers.The embryological development of the IOM is not well characterized. Joints form through the suppression of chondrogenesis, followed by the development of articular cavities. By the 12th week of gestation, the stabilizing structures of the DRUJ, including collateral ligaments, radiocarpal ligaments, and the future triangular disc, are already visible.The distal region includes the DOB, present in 40% of the population, which originates in the distal sixth of the ulnar diaphysis and inserts distally on the sigmoid ridge of the radius. The DOB acts as a secondary stabilizer during pronosupination, especially when TFCC ligaments are compromised...
The interosseous membrane of the forearm (IOM) is a robust ligamentous complex connecting the ulna and radius, contributing along with the distal radioulnar joint (DRUJ) to the axial stability of the forearm. Injuries to these structures can significantly disrupt force transmission. The DRUJ is primarily stabilized by the triangular fibrocartilage complex (TFCC), although other structures related to the IOM, such as the Distal Oblique Band (DOB), serve as secondary stabilizers.The embryological development of the IOM is not well characterized. Joints form through the suppression of chondrogenesis, followed by the development of articular cavities. By the 12th week of gestation, the stabilizing structures of the DRUJ, including collateral ligaments, radiocarpal ligaments, and the future triangular disc, are already visible.The distal region includes the DOB, present in 40% of the population, which originates in the distal sixth of the ulnar diaphysis and inserts distally on the sigmoid ridge of the radius. The DOB acts as a secondary stabilizer during pronosupination, especially when TFCC ligaments are compromised...
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Medicina, leída el 21-05-2025











