. Cunningham's Text-book of anatomy. Anatomy. CAEPAL JOINTS. 329 Anterior radio- ulnar ligament Collateral radio-carpal ligament Pisiform bone of the radius, as well as slightly to the base of the styloid process of the ulna. Some transverse fibres may be seen, but the greater num- ber pass obliquely dis- tally and medially to the volar non-artic- ular surfaces of the navicular, lunate, and Medial ul"°-carPai triquetral bones, while some of them may even be continued as far as the capitate bone. Those fibres from the ulna run obliquely laterally. On its deeper aspect this ligament is clos
. Cunningham's Text-book of anatomy. Anatomy. CAEPAL JOINTS. 329 Anterior radio- ulnar ligament Collateral radio-carpal ligament Pisiform bone of the radius, as well as slightly to the base of the styloid process of the ulna. Some transverse fibres may be seen, but the greater num- ber pass obliquely dis- tally and medially to the volar non-artic- ular surfaces of the navicular, lunate, and Medial ul"°-carPai triquetral bones, while some of them may even be continued as far as the capitate bone. Those fibres from the ulna run obliquely laterally. On its deeper aspect this ligament is closely adherent to the volar border of the articular disc of the distal radio- ulnar articulation. Lig\ Radiocar- peum Dorsale.—The dorsal radio-carpal ligament ( poster- ior ligament) extends from the dorsal margin Capitate bone, with ligaments radiat- ing from it Hamulus of os hamatum. Fig. 310.—Ligaments on Volar Aspect of Radio-carpal, Carpal, and Carpo-metacarpal Joints. of the distal end of the radius, in an oblique direction distally and medially, to the dorsal non-articular areas on the proximal row of the carpal bones. The slip to the latter assists in forming the fibrous sheath through which the tendon of the ex- tensor carpi ulnaris muscle travels to its insertion. The principal bundle of fibres is connected with the triquetral bone. The stratum synoviale (Fig. 311) is simple, and is confined to the articulation, except in those cases in which the articular disc is perforated, or in which one of the interosseous ligaments between the carpal bones of the first row is absent. The epiphyseal lines at the distal ends of radius and ulna are extra-capsular. Movements at the Radio-carpal Joint.—The radio-carpal joint affords an excellent example of a bi-axial articulation, in which a long transverse axis of movement is situated more or less at right angles to a short axis placed in the antero-posterior direction. The nature of the move- ments which are possible arou
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
