SHOULDER, ARM, FOREARM, AND HAND. 



157 



The cutaneous branch of the musculo-cutaneous nerve supplies the skin over 

 the insertion of the biceps ; inasmuch as the supinator longus is also a flexor of 

 the forearm, and receives a part of its nerve-supply from the musculo-cutaneous 

 nerve, the skin over the insertion of this muscle is also supplied by the same 

 nerve. See Hilton's law in the introductory chapter. 



Plexor brevis 



pullieia 



Abductor pollicis 



Flexor carpi ulnaris 

 Abductor minimi 

 digiti 



Flexor brevis and 

 opponens minimi 

 digiti 



Flexor carpi 

 ulnaris 



Adductor pollicis 



Opponens minimi 



digiti 



Abductor and 

 flexor brevis 

 minimi digiti 



Opponens pollicis 



Occasional insertion into trapezium 

 Extensor oasis metacarpi pollicis 



Flexor carpi radialis 

 Interosseus primus volaris 

 Opponens pollicis 



Flexor brevis and 

 Abductor pollicis 



Flexor brevis and 

 Adductor pollicis 



Flexor longua 

 pollicis 



Flexor sublimis digitorum 



Flexor profundus digitorum 



FIG. 109. THE LEFT HAND. (Palmar surface.} 



DEEP FASCIA OF THE HAND. 



The deep fascia fascia profunda lies immediately under the superficial 

 fascia, being in intimate trabecular relation with the deep layer of the superficial 

 fascia. In the palm of the hand it is very dense and heavy ; over the thenar and 

 hypothenar eminences it is very thin. 



The deep fascia takes the following special names : 



1. The anterior annular ligament in front of wrist. 



2. The palmar fascia in palm of the hand. 



3. The ligamenta vaginales on flexor side of the digits. 



