Hand wrist bones Eminentia carpi radialis Tuberculum ossis
Hand wrist bones
Eminentia carpi radialis= Tuberculum ossis scaphoidei + os trapezium Eminentia carpi ulnaris= Hamulus ossis hamati + os pisiforme
Base (basis) Body (corpus) Head (caput)
Radiocarpal joint The wrist joint = the radiocarpal joint + the intercarpal joints. The radiocarpal joint = the distal articular surface of the radius + three proximal carpal bones = the scaphoid + lunate + triquetrum. The radiocarpal joint is a condylar articulation (flexion/extension, adduction/abduction, and circumduction) The intercarpal joints are plane joints that permit sliding and slight twisting movements
Intercarpal joint
Carpal surfaces that do not participate in articulations are roughened by the attachment of ligaments and for the passage of tendons. A tough connective tissue capsule, reinforced by broad ligaments, surrounds the wrist and stabilizes the positions of the individual carpal bones. The major ligaments include the following: the palmar radiocarpal ligament, which connects the distal radius to the anterior surfaces of the scaphoid, lunate, and triquetrum; the dorsal radiocarpal ligament, which connects the distal radius to the posterior surfaces of the same carpal bones (dorsal surface); the ulnar collateral ligament, which extends from the styloid process of the ulna to the medial surface of the triquetrum; the radial collateral ligament, which extends from the styloid process of the radius to the lateral surface of the scaphoid.
The joints of the hand The carpometacarpal joint of the thumb = The first metacarpal bone has a saddle-type articulation at the wrist II, IV, V carpal/metacarpal articulations = plane joints Intercarpal joint = by carpal/carpal articulation. Metacarpophalangeal joints = the articulations between the metacarpal bones and the proximal phalanges (are condylar, permitting flexion/extension and adduction/abduction) The interphalangeal joints = hinge joints that allow flexion and extension
- Slides: 10