Wrist Joint

  1. Name the two joints of the wrist
    • Radiocarpal
    • Midcarpal
  2. Radiocarpal Joint
    • Proximally - distal end of radius and radioulnar disk
    • Distally- scaphoid, lunate, triquetrum
    • Ulna is not part of the wrist
    • Synovial
    • Biaxial
  3. Midcarpal Joint = Intercarpal Joint
    • Between two rows of carpal bones
    • contributes to wrist motion
    • Irregular plane joints
    • non axial - gliding motion
  4. Carpometacarpal Joints (CMC)
    • located between the distal row of carpal bones and the proximal end of the metacarpal bones
    • Considered part of the hand
  5. Name the Carpal Bones
    Scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, hamate
  6. list the 4 basic ligaments of the radiocarpal joint
    • radial collateral ligament
    • ulnar collateral ligament
    • palmar raiocarpla ligament
    • dorsal radiocarpal ligament
  7. Radial Collateral Ligament
    • Attachement
    • styloid process of radius
    • scaphoid and trapeium bones
    • provides lateral support to the wrist
  8. Ulnar Collateral Ligament
    • Attachments
    • styloid process of ulna
    • pisiform and triquetrum bones
    • provides medial support to the wrist
  9. Palmar Radiocarpal Ligament
    • Thick though ligament
    • limits wrist extension
    • Attachmetns
    • anterior distal radius and ulna
    • anterior surface of the scaphoid lunate and triquetrum
    • most likely to be sprained
  10. Dorsal radiocarpal Ligament
    • attachments
    • posterior surface of the distal radius
    • posterior surface of the scaphoid lunate and triqutrium
    • limits wrist flexion
    • not as strong as the palmar radiocarpal ligament
  11. Joint Capsule of the Wrist
    • encloses the radiocarpal joint
    • reinforeced by ligaments
  12. Articular Disk
    • located distal ulna
    • articulates with triquetrum and lunate
  13. Palmar Fascia = Palmar Aponeurosis
    Thick triangular shaped fascia
Card Set
Wrist Joint