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UPPER LIMB WRIST JOINT 2012
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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
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WRIST JOINT Joint cavity can be continuous with those of the intercarpal joints Synovial membrane lines the non-articular elements in the joint
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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
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DORSAL 9 extensor tendons cross wrist joint in 6 compartments deep to extensor retinaculum 3 double and 3 single
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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
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CARPOMETACARPAL JOINTS THUMB
Thumb = saddle joint Articulates with trapezium Fibrous capsule surrounds joint Joint cavity lined by synovial membrane Palmar, dorsal radial carpometacarpal ligaments
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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
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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
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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
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METACARPOPHALANGEAL JOINTS MOVEMENTS
ABDUCTION ADDUCTION FLEXION EXTENSION THUMB only Flexion extension
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INTERPHALANGEAL JOINTS
Structure similar to MCP joints Movements Flexion Extension
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