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
      - Above to lower ends of radius and ulna
      - 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