1170 



SURGICAL AND TOPOGRAPHICAL ANATOMY 



intimate connection -with the superficial fascia and skin, is well adapted to protect 

 the parts beneath from pressure. The thenar and hypothenar muscles are enclosed 

 in two processes, which are thinner so as not to interfere with the contraction of 

 the subjacent muscles. The central part, pointed above at its attachment to the 



Fig. 736. — Tendons upon the Dorsum of the Hand. 



Extensor oasis metacarpi 

 pollicis 



Extensor brevis pollicis 



Posterior annular ligament 



Extensor carpi 

 radialis brevior 



Extensor carpi 

 radialis longior 



Extensor longus 

 pollicis 



First dorsal 

 interosseous 



Adductor — ■/- 

 pollicis 



Extensor carpi ulnaris 



Extensor communis digitorui: 



Extensor minimi digiti 



Extensor indicis 



Attachment of extensor 

 communis digitorum 

 to second phalanx 



Attachment of extensor 

 communis digitorum 

 to third phalanx 



annular ligaments, spreads out fan-like below, and gives off four slips, each of which 

 bifurcates into two processes, which are attached to the sides of the first phalanx 

 of each finger and into the transverse ligament which ties the heads of the meta- 

 carpal bones together. Transverse fiV)res ]iass l)etween the processes into Avhich 

 each of the four slips bifurcates, and thus form the beginning of the theca, which is 



