SOFT-TISSUE ANATOMY AND RELATIONSHIPS ABOUT THE DISTAL ULNA

The author investigates the complex anatomic relationship between the ulnar head and adjacent osseous structures (radius and carpus). Specia l attention is directed to the orientation and shape of the articular surfaces, the constraining effects of specific membranes and Ligaments (radio-ulnar and ulnocarpal), the shock-absorbing function of the tri angular fibrocartilage, and the dynamic action of specific muscles (pr onator quadratus and extensor carpi ulnaris). The anatomy of other non stabilizing structures (meniscus homologue and prestyloid recess) is a lso discussed.