SIIOl'I.DI-'.K, ./A' I/. FOREARM, .I.V/> HAND. 



'65 



The Palmar Interossei Muscles (Figs, i 14 and 1 15). These are three in 

 number. They are physiological adductors. They arise from one side of the 

 metacarpal bone corresponding to the finger, into the base of whose proximal 

 phalanx they arc inserted. They are inserted into the bases of the proximal 

 phalanges of the index, little, and ring fingers in such a way as to adduct these 

 fingers to the middle finger. Trace branches to them from the deep palmar 

 branch of the ulnar nerve. 



The Deep Palmar Branch of the Ulnar Nerve. You have seen the ulnar 



Anterior interosseuns 



Radial artery 



Anterior radial carpal 



Superficial volar 



Posterior radial caroal 

 Radial artery at wrist 



Dorsalis pollicis 

 M?.tacarp<il or 



Jirst ttnr.^il 



Dorsalu iiulicit 

 Radialis indicts 



Ulnar artery 



Anterior ulnar 

 carpal 



Posterior ulnar 

 carpal 



Deep ulnar 



Superficial arch 



Carpal recurrent 



Posterior communi- 

 cating or perforat- 

 ing 



Palmar interossemw 



Second, third, and 

 fourth palmar 

 digital 



Second and third 

 dortal intcrosseous 



First palmar digital 



A ntei-ior communi- 

 cating or perforat- 

 ing 



Firtt dortal branch of collateral 

 digital 



Second dortal branch of collateral 

 digital 



Anastomosis of collateral digital 

 arteries about matrix of nail 

 and pulp ofjinger 



FIG. 116. ANASTOMOSES AND DISTRIBUTION OF THE ARTERIES OF THE HAND. 



nerve crossing the anterior annular ligament, and dividing, below the pisiform 

 bone, into superficial and deep palmar branches. (Fig. in.) You traced the 

 superficial branches to the palmaris brevis, the skin over the hypothenar emi- 

 nence, and to the little finger and half the ring finger. (Fig. 1 1 1.) You will now 

 trace in review the deep palmar branch, between the abductor minimi digiti and 

 flexor brevis minimi digiti, and see it join company with the deep palmar arterial 

 arch, and send off branches to these muscles : 



