SHOULDER, ARM, FOREARM, AND HAND, 



161 



A case of unusual interest, bearing on this point, reported by Dr. David Loring, 

 of Valparaiso, Indiana, is as follows : " Infection ensued where a patient thrust a 

 nail through the anterior annular ligament. One by one all the carpal bones, the 

 bones of the thumb and the little finger, and the greater part of the metacarpals 

 disappeared by suppuration. At the present time the patient is well, and has the 

 bones of all the fingers between the thumb and little firmer." This case is of 



Anterior inlerosseous 



Radial artery 



Anterior radial carpal 



Svperficial rolar 

 Posterior radial carpal 

 Radial artery at wrist 



Dorsalis potUcis 



MKtacar/nil or 



first dorsal 



inlerosseous 



Princepspollicis 



Dorsalis indicts 

 Jladialis indicis 



First dorsal branch of collateral 

 digital 



Second dorsal branch of collateral 

 digital 



Anastomosis of collateral digital 

 arteries about matrix of nail 

 and pulp of finger 



Ulnar artery 



Anterior ulnar 

 carpal 



Posterior ulnar 

 carpal 



Deep ulnar 

 Superficial arch 



Carpal recurrent 



Posterior communi- 

 cating or perforat- 

 ing 



Palmar interosseous 



Second, third, and 

 fourth palmar 

 digital 



Second and third 

 dorsal interosseous 



First palmar digital 



Anterior communi- 

 cating or perforat- 

 ing 



FIG. 113. ANASTOMOSES AND DISTRIBUTION OF THE ARTERIES OF THE HAND. 



interest because the pathological process followed to the letter the anatomical 

 rule. 



The vincula will be seen between the flexor tendons. They are delicate, sil- 

 very, tendinous threads. They aid the capillaries in passing from -one tendon to 

 another. They are, then, mechanical devices for the support of the capillaries 

 that nourish the synovial membrane. In some cases the vessels which they 

 support are injected, and can be seen by the unaided eye. 



The palmaris brevis muscle (Fig. 110) arises from the annular ligament 



