RADIOCARPAL JOINT
- Wrist
- Type
- Radiocarpal joint
- Ellipsoid variety ( synovial )
- Articular surfaces
- Upper
- Inferior surface of lower end of radius
- Articular disc of inferior radioulnar joint
- Lower
- Scaphoid
- Lunate
- Triquetral
- Ligaments
- Articular capsule
- Attachment
- Below to proximal row of carpal bones
- Recessus sacciformis
- Lies infront of styloid process of ulna
- In front of articular disc
- Palmar radiocarpal ligament
- Broad band
- Palmar ulnocarpal ligament
- Begins above base of styloid process of ulna
- And anterior margin of articular disc
- Dorsal radiocarpal ligament
- Begins above posterior margin of lower end of radius
- Attached below to
- Dorsal surfaces of scaphoid , lunate and triquetral
- Radial collateral ligament
- Extent
- Tip of styloid process of radius to lateral side of scaphoid bone
- Ulnar collateral ligament
- Extent
- Tip fo styloid process to triquetral and pisiform bones
- Blood supply
- Anterior and posterior carpal arches
- Nerve supply
- Anterior and posterior interosseus nerves
- Relations
- Anterior - long flexor tendons of and median nerve
- Posterior - extensor tendons of wrist , and fingers with their synovial sheaths
- Lateral - radial artery
- MOVEMENTS
- Flexion
- Flexor carpi ulnaris , flexor carpi radialis , palmaris longus
- Extension
- Extsnro carpi radialis longus and brevis , extensor carpi ulnaris ,
- Abduction ( radial deviation )
- Flexor carpi radialis , extensor carpi radialis brevis and longus
- Adduction ( ulnar deviation )
- Flexor and extensor carpi ulnaris
- Circumduction
| Type | Synovial ellipsoid joint; |
| Articular surfaces | Proximal component - distal end of radius, articular disc |
| Distal component - scaphoid, lunate and triquetral of the proximal row of carpal bones (also includes triangular fibrocartilage complex) | |
| Ligaments | Palmar radiocarpal joint, dorsal radiocarpal ligament, ulnar collateral ligament, radial collateral ligament |
| Innervation | Anterior interosseous nerve arising from median nerve (C5-T1) |
| Posterior interosseous nerve arising from radial nerve (C7-C8) | |
| Deep and dorsal branches of the ulnar nerve (C8-T1) | |
| Blood supply | Branches of the dorsal and palmar carpal arches |
| Movements | Flexion, extension, adduction and abduction |
Discussion