FOREARM AND HAND 



121 



of the navicular bone and the ridge of the greater multangular 

 bone, and on the medial side to the pisiform bone and the 

 hook of the os hamatum. Its proximal margin is in a measure 

 continuous with the deep fascia of the forearm, of which 

 it may be considered to be a thickened part ; whilst distally, 

 it is connected with the palmar aponeurosis. 



Upon the volar surface of the transverse carpal ligament the 

 expanded tendon of the palmaris longus is prolonged distally 

 to the intermediate part of the palmar aponeurosis, whilst on 



M. palmaris longus 

 N. medianus Lig. carpi transversum 



M. flex. poll. long. 

 A. volaris superficialis 



M. flex. carp. rad. \ 



Short muscles of thumb 



M. abd. poll. long % 



A. ulnaris 



/ M. palmaris brevis 

 ' . N. ulnaris 



M. ext. poll. brev. 



A. radialis' 

 M. ext. long, poll.' 



M. ext. carp. rad. long. 

 N. radialis rain, su 



Short muscles of 

 little finger 



(O.T. radial) 



M. ext. carp. rad. bre 1 



^TYs ^' ex ^* car P- ul 

 M. ext. dig. quinti 

 N. ulnaris, ramus dorsalis 



M. ext. dig. comm. and ext. indicis 



FIG. 47. Transverse section through the Wrist at the level of the Distal 



Row of Carpal Bones to show the Carpal Tunnel. The Tendons of the 



Flexor Digitorum Sublimis, Flexor Digitorum Profundus, and Flexor 

 Pollicis Longus are seen within the Tunnel. 



each side several of the short muscles of the thumb and little 

 ringer take origin from it. Close to its medial attachment the 

 ulnar artery and nerve find their way into the palm by pass- 

 ing superficial to it and deep to a more superficial fasciae 

 band, the ligamentum carpi volare, which is attached on the 

 medial side to the pisiform and the hook of the os hamatum, 

 and on the lateral side to the tubercle of the navicular and 

 the ridge of the great multangular bone. 



The tunnel which the transverse carpal ligament forms 

 with the volar concavity of the carpus is transversely oval in 

 shape, and it opens distally into the intermediate compartment 

 of the palm. Through it pass the tendons of the flexor 



