UPPER LIMB WRIST JOINT 2012.

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Presentation transcript:

UPPER LIMB WRIST JOINT 2012

WRIST JOINT Synovial ellipsoid joint Distal end of the radius concave Scaphoid is convex, lunate, triquetrum Fibrous capsule attached to articular margins of bony elements Joint cavity usually not continuous with that of the distal radio-ulnar joint Articular disc sometimes perforated

WRIST JOINT Joint cavity can be continuous with those of the intercarpal joints Synovial membrane lines the non-articular elements in the joint

PALMAR Brachioradialis Radial artery Flexor carpi radialis Palmaris longus with median n deep to it Palmaris absent in about 12% cases Flexor digitorum profundus Ulnar artery Ulnar nerve Flexor carpi ulnaris

DORSAL 9 extensor tendons cross wrist joint in 6 compartments deep to extensor retinaculum 3 double and 3 single

DORSAL Lateral to Medial Abductor pollicis longus, Extensor pollicis brevis Extensor carpi radialis longus, Extensor carpi radialis brevis Extensor pollicis longus Extensor digitorum, Extensor indicis Extensor digiti minimi Extensor carpi ulnaris

CARPOMETACARPAL JOINTS THUMB Thumb = saddle joint Articulates with trapezium Fibrous capsule surrounds joint Joint cavity lined by synovial membrane Palmar, dorsal radial carpometacarpal ligaments

CARPOMETACARPAL JOINTS THUMB Resting position Palmar surface medial Dorsal surface lateral Flexion Thumb moves medially Extension Thumb moves laterally Abduction Thumb moves ant Adduction Thumb towards palm Flexion tog with 30 degree med rot Extension tog with 30 degree lat rot

METACARPOPHALANGEAL JOINTS Synovial condylar joint Metacarpal with proximal phalanx Dorsal side Fibrous capsule replaced by extensor hood Ventral Palmar plate / ligament Ant part being grooved by long flexor tendons Lateral side Capsule reinforced by collateral ligaments

METACARPOPHALANGEAL JOINTS Synovial condylar joint Metacarpal with proximal phalanx Dorsal side Fibrous capsule replaced by extensor hood Ventral Palmar plate / ligament Ant part being grooved by long flexor tendons Lateral side Capsule reinforced by collateral ligaments

METACARPOPHALANGEAL JOINTS MOVEMENTS ABDUCTION ADDUCTION FLEXION EXTENSION THUMB only Flexion extension

INTERPHALANGEAL JOINTS Structure similar to MCP joints Movements Flexion Extension