Wrist and Hand.ppt

Wrist and Hand 山东大学医学院 解剖教研室 李振华 Surface anatomy of wrist and hand Anatomical “snuff box” 鼻烟壶 Medial: tendon of the extensor pollicis longs Lateral: tendons of the abductor pollicis longus and extensor pollicis brevis Proximal: styloid process of radius Floor: scaphoid and trapezium bones Radial a. crosses the floor of the snuff, so may fell the radial pulse in this fossa Anatomical “snuff box” Deep fascia of the wrist Palmar carpal ligament 腕掌侧韧带 Flexor retinaculum 屈肌支持带 Thickening of deep fascia in the hand Attached laterally to scaphoid and trapezium and medially to pisiform and hamate Ulnar carpal canal 腕尺侧管 Formed by the distal part of palmar carpal ligament and flexor reticulum Transmit the ulnar a., v. and n. Radial carpal canal 腕桡侧管 The radial end of flexor reticulum is attached to the tubercles of scaphoid and trapezium Transmit tendon of flexor carpi radialis ★Carpal tunnel Composition: Formed by flexor retinaculum and carpal groove Structures passing through the carpal tunnel Median n. The tendons of flexor digitorum superficialis and flexor digitorum profundus enclosed by common flexor synovial sheath The tendon of flexor pollicis longus enclosed by synovial sheath for flexor pollicis longus Carpal tunnel Carpal tunnel Posterior region of wrist 腕后区 Extensor retinaculum 伸肌支持带 Thickening of deep fascia of forearm a wrist Attached laterally to radius and medially to styloid process of ulna and triquetral bone Forms six fibrous compartments for extensor tendons passing from forearm into hand Posterior region of wrist 腕后区 ① tendons of abductor pollicis longus and extensor pollicis brevis and their synovial sheaths; ② tendons of extensor carpi radialis longus and brevis and their synovial sheaths; ③ tendon of extensor pollicis longus and its synovial sheath; ④ tendons of extensor digitorum, extensor indicis and their synovial sheaths; ⑤ tendon of extensor digiti minimi and its synovial sheaths; ⑥ tendon of extensor carpi ulnaris and its syn