92 



THE MUSCLKS. 



92. M. extensor digiti ]J projtritts long as (Fig-. 79 e2, el'). 



Duges, cubito-radio-sous-phalangien de 1'index, n. 96. 



This muscle lies obliquely on the back of the hand, parallel 



with the m. abductor digiti II. It 

 arises by two heads, one from the 

 tendon of the jlexor ai/tibr. lat. 

 superf. (n. 60) upon the hinder ex- 

 tremity of the radio-ulnar. This 

 tendon conceals the hinder end of 

 this bone by means of a patella-like 

 thickening-, and sends forth three 

 tendinous prolongations ; of these, 

 the one is attached to the ulnar 

 border of the radio-ulnar, the second 

 to the os naviciilare, while the third 

 constitutes that portion of the ///. 

 extens. dig. II proprius long, which 

 is under consideration. The second 

 head arises from the os pyramid ale 

 in connection with the extensor digi- 

 lorinn com munis breris (n. 90). The 

 heads unite to form a long muscle, 

 which runs obliquely towards the 

 second finger, passes into a tendon, 

 which, after forming connections 

 by some muscular fibres with the 

 metacarpal, is inserted into the ter- 

 minal phalanx. 



Muscles of hand of liana esculenta. Uoroul 

 view, twice natural size. 



irft.2. M. abductor dig. II longus. 

 06.2' M. abductor dig. II brevis. 

 ads M. adductor dig. II. 



' 2 , } M. extensor dig. II longus. 



C2 > 



) M. extensor digitorum communis 

 e * | brevis. 

 ''5 ' 

 1-62 M. extensor dig. II proprius 



brevis. 



cc M. extensor carpi ulnaris. 

 fn M. flexor antibr. lat. superficial. 



_"MM. interossei. 



''5 



II-V as in Fig. 77. 



93. M. extensor dig. U proprius brevis (Fig-. 79 ell}. 



Duges, sus-limo-phalangettien de 1'index, n. 120. 



This muscle lies between the preceding- muscle and the old u <!<>/ 

 dig. II lonyits. It arises from the os naviciilare, and also includes 

 some fibres which arise from the second metacarpal. The tendon 

 runs along- the radial side and is inserted along with the last 

 muscle into the terminal phalanx. 



94. J\L abductor dig. II brevis (Fig-. 79 ah.l'}. 



Duges, sus-limo-ine'tacarpien de 1'index, n. 88. 



This represents the abduct, pollic. brevis of man, lies on the outer 

 side of the hand, arises from the os naviciilare, and is inserted into 

 the second metacarpal. 



