Download
1 / 1
10 likes | 124 Vues
This discussion highlights the significant correlation between bony injuries and concomitant soft tissue damage. Such injuries often result in considerable stiffness at the metacarpophalangeal (MP) joint, especially in the index, middle, ring, or small fingers, which can severely affect hand function. In contrast, while stability is essential for the thumb MP joint, mobility may vary greatly among individuals. Some can flex their thumb through a limited arc of only 15-20 degrees while others exceed 90 degrees, illustrating the substantial variability in thumb joint motion and its impact on hand performance.
E N D
discussion With this degree of bony injury, there has to be a massive associated soft tissue injury that will lead to considerable stiffness at the MP joint. This would be devastating in the index, middle, ring or small finger, but of no particular concern in the thumb. The principal requirement for a functional thumb MP joint is stability, mobility is of secondary importance, as testified by the fact that some people can flex their thumb MP joint through an arc of only 15-20 degrees while others have an arc of over 90 degrees without any gain in function. There is more person-to-person variability in motion at the thumb MP joint than at any other joint in the body.
