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AAAC38 21/5/05 10:48 AM Page 86
38 The carpal tunnel and joints of the wrist and hand
Ulna nerve and artery
Thenar
Hypothenar muscles
muscles
Flexor retinaculum
Flexor Median nerve
carpi radialis Tendons of flexor
Vein
Flexor pollicis digitorum superficialis
longus
Tendons of flexor
Trapezium digitorum profundus
Trapezoid Hamate

Capitate
Fig.38.1
A diagrammatic cross-section through the carpal tunnel

Flexor retinaculum
Radius
Occasional
Ulna communication
Fig.38.2
Disc of The synovial sheaths of the flexor tendons
fibrocartilage
Scaphoid
Midcarpal
joint
Trapezium Articular
cartilage

1st
metacarpal
Dorsal tubercle of radius
Extensor pollicis longus
Fig.38.3 Cephalic
The wrist and carpal joints vein Scaphoid First dorsal interosseous
Extensor expansion

Extensor pollicus brevis
Radial
artery

Abductor
pollicus longus
Fig.38.4
The anatomical snuffbox

86 Upper limb