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W RIST J OINT

W RIST J OINT. Type of Joint. Synovial Joint of the Ellipsoid variety. Articular Surface. Upper Inferior Surface of lower end of radius. Articular disc of the inferior radioulnar joint Lower Scaphoid Lunate Triquetral Bones. LIGAMENTS. 1 . Articular capsule 2 . On palmar aspect

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W RIST J OINT

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  1. WRIST JOINT

  2. Type of Joint • Synovial Joint of the Ellipsoid variety.

  3. Articular Surface • Upper • Inferior Surface of lower end of radius. • Articular disc of the inferior radioulnar joint • Lower • Scaphoid • Lunate • Triquetral Bones

  4. LIGAMENTS 1 . Articular capsule 2 . On palmar aspect - palmar radiocarpal ligament -palmar ulnocarpal ligaments 3. On dorsal aspect - dorsal radiocarpal ligament 4. Radial collateral ligament 5. Ulnar collateral ligament

  5. 2. Palmar Aspect: • Palmar radiocarpal ligament. Anterior margin of the lower end of the radius and its styloid process and attaches to ant surface of the Scaphoid, Lunate, Triquetral and Capitate bones. • Palmar ulnocarpal ligament. Base of the styloid process of the ulna and the anterios margin of the articular disc and attached to Lunate, Capitate and Triquetral bones

  6. Ligaments • Dorsal aspect: • Dorsal Radiocarpal ligament. • Posterior margin of the lower end of the radius, attached to dorsal surface of the Scaphoid, Lunate and Triquetral bones. • Radial Collateral Ligament: Tip of the styloid process of the radius to the lateral side of the scaphoid. • Ulnar Collateral Ligament: Tip of the scaphoid process of the ulna to the triquetral and pisiform bones.

  7. Relations. • Anterior: • Long flexor tendons with their synovial sheaths. • Median Nerve. • Posterior: • Extensor Tendons of wrist and fingers with their sheaths. • Lateral : • Radial Artery.

  8. Blood Supply. • Anterior and the posterior carpal arches.

  9. Nerve Supply. • Anterior and posterior Interosseous nerves.

  10. Movements Flexion: takes place more at midcarpal joint than at wrist joint Main flexors • Flexor carpi radialis. • Flexor carpi ulnaris. • Palmaris Longus Assisted by long flexors of fingers and thumb and the abductor pollicis longus.

  11. Movements Extension: it takes place mainly at wrist joint. Main extensors- • Extensor carpi radialis longus. • Extensor carpi radialis brevis. • Extensor carpi ulnaris. Assisted by extensors of the fingers and the thumb.

  12. Movements Abduction: occurs mainly at midcarpal joint. Main abductors- • Flexor carpi radialis • Extensor carpi radialis longus. • Extensor carpi radialis brevis. • Abductor Pollicis longus. • Extensor Pollicis brevis.

  13. Movements • Adduction: occurs mainly at the wrist joint • Flexor carpiulnaris. • Extensor carpiulnaris.

  14. Clinical Anatomy • injuries of the wristFractures of distal radius.1. Colle’s fracture. 2. Smith’s fracture • Colle’s fractureThis is fracture of the distal end of the radius produced by a fall on to the palm of the outstretched hand.  The appearance of wrist is typical and described as a ‘dinner – fork’ deformity. Viewed from the side the dorsal aspect of the wrist is unduly prominent and hand is radially deviated

  15. Smith’s fractureThis is the reverse of Colle’s fracture, the distal fragment is flexed rather than dorsiflexed. It is uncommon. It is due to a fall on the dorsum of the palmar – flexed wrist or due to a backward fall on the outstretched hand.

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