Wrist Joint

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Name the two joints of the wrist
- Radiocarpal
- Midcarpal
Radiocarpal Joint
- Proximally - distal end of radius and radioulnar disk
- Distally- scaphoid, lunate, triquetrum
- Ulna is not part of the wrist
- Synovial
- Biaxial
Midcarpal Joint = Intercarpal Joint
- Between two rows of carpal bones
- contributes to wrist motion
- Irregular plane joints
- non axial - gliding motion
Carpometacarpal Joints (CMC)
- located between the distal row of carpal bones and the proximal end of the metacarpal bones
- Considered part of the hand
Name the Carpal Bones

Scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, hamate
list the 4 basic ligaments of the radiocarpal joint
- radial collateral ligament
- ulnar collateral ligament
- palmar raiocarpla ligament
- dorsal radiocarpal ligament
Radial Collateral Ligament
- Attachement
- styloid process of radius
- scaphoid and trapeium bones
- provides lateral support to the wrist
Ulnar Collateral Ligament
- Attachments
- styloid process of ulna
- pisiform and triquetrum bones
- provides medial support to the wrist
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
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
Joint Capsule of the Wrist
- encloses the radiocarpal joint
- reinforeced by ligaments
Articular Disk
- located distal ulna
- articulates with triquetrum and lunate
Palmar Fascia = Palmar Aponeurosis

Thick triangular shaped fascia

Author

hgienau

51266

Card Set

Wrist Joint

Description

Wrist

Updated

2010-11-23T03:40:32Z

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