458 



MYOLOGY 



sheath of these tendons. The sheath of the tendon of the Flexor pollicis longus 

 is continued along the thumb as far as the insertion of the tendon. The mucous 

 sheaths enveloping the terminal parts of the tendons of the Flexores digitorum 

 have been described on page 449. 



Sheaths of terminal 

 parts of Flexores "^^^ 



Muscles of thenar 

 eminence 



Sheath of Flexor 

 pollicis longus 



SJieath oj Flexor carpi 

 radialis 



Miiscles of hypo- 

 thenar eminence 



Common sheath of 

 Flexores digitorum 

 sublimis and 

 profundus 



Flexor carpi vlnaris 



Fia. 423. The mucous sheaths of the tendons on the front of the wrist and digits. 



Dorsal Carpal Ligament (ligamentum carpi dorsale; posterior annular ligament) 

 (Figs. 421, 422). The dorsal carpal ligament is a strong, fibrous band, extending 

 obliquely downward and medialward across the back of the wrist, and consisting 

 of part of the deep fascia of the back of the forearm, strengthened by the addition 

 of some transverse fibers. It is attached, medially, to the styloid process of the ulna 



