170 



TIII: MI sc/J v 



Fig. 1. I'IKKKKKVTIAI. CHARAiTEHS OF THE 1IC8CLE8 OF THE FORJC- 



AltM IN OTIIKK THAN SOLII'KD ANIMALS. 



lit MINAXTS. In the Ox and Sheep, the anttr, 

 tensor of the metacarpus comports itself as in S>li j 



The oblique extensor of the metacnrjms of tlio same 

 region terminates inside the upper extremity of the jirin- 

 cipal metacarpus. 



The anterior extensor of the phalanges offers a remark - 

 aUe disposition. This muscle is divided throughout its 

 length into two parallel portions : an external, which forms 

 the common extensor of the digit*; and an internal, the 

 proper extensor of the internal diijil. 



a. The fleshy body of the common extensor (fig. 123, 3) 

 is a little more voluminous than that of the second inii -!-. 

 Its tendon ( 3') commences near the inferior third of the 

 radius, passes over the knee, the metacarpal bone, and the 

 metacarpo-phulangeal articulation. ()n arriving at the 

 origin of the digits it bifurcates, and each of its brand us 

 goes to be inserted into the pyramidal eminence of the 

 third phalanx (3"). This muscle, in extending the digits, 

 brings them together, as M. Lecoq has judiciously re- 

 marked. 



b. The proper extensor of the internal digit (fig. 123, 4) 

 much resembles the common extensor in volume, form, 

 and direction. Its tendon (4') passes, with that termi- 

 nating the latter muscle, into one of the inferior grooves 

 of the radius and over the capsular ligament of the carpus, 

 where the two cords are enveloped by a common synovial 

 sheath. Arrived at the metacarpn-phalangeal articulation, 

 tliis tendon is placed at the excentric side of the internal 

 digit, and descends, gradually expanding, until it reaches 

 the inferior extremity of this bone ; towards the middle of 

 the first phalanx, it receives from the suspensory liimni' nt 

 of the fetlock two constraining bands similar to those 

 which, in Solipeds, bind the anterior exten.-or of the pha- 

 langes on the same bone. This tendon bifurcates infe- 

 riorly ; one of its branches is attached to the anterior face 

 of the second phalanx ; the other, much wider than the 



MUSCLES OF THE FORE-ARM fi r8 t, covers the common external lateral ligament of the 



OF THE ox; EXTERNAL FACE, two inter-phalangeal articulations, and terminates on t)i- 



1, Anterior extensor of the whole external side of the third p! alanx. In the Sheep, 



metacarpus; 1', Insertion of this second branch is feeble, and i* directed towards the 



its tendon; 2, Oblique ex- heel, which it envelopes by uniting its fibres with the per- 



tensor ; 3, Common extensor forans tendon and the plantar cushion, 

 of the digits; 3', Its tendon; The lateral extensor of the phalanyes of Ruminants is 



3", Terminal bifurcation of thicker than in the Horse, and constitutes the proper ex- 



that tendon; 4, Proper ex- tensor of the external digit (fig. 123, 5). Its terminal 



tensor of the internal digit ; tendon (4 1 , 6, 7) comports itself exactly the same as that 



4', Its tendon ; 5, Proper of the proper extensor of the internal digit, and .conse- 



extensor of the external quently does not merit a special description. We may 



digit; 5', Its tendon ; 6, Its remark, with M. Lecoq, that the-e I\M. nm-eles separate 



branch of insertion into the the digits from each other in extending them; they are, 



second phalanx; 7, Branch therefore, to a certain point, antagonists of the common 



to the third phalanx; 8, extensor. 



External flexor of the meta- The perforalus of the Ox and Sheep LJ composed of 



carpus; 9, Olecranian por- two portion?, whose tendons unite towards the middle of 



tion of the perforans; 10, the me tacarpal region. The single tendon (fig. 124, 1, 2, 3) 



Tendon of the perforans; which results from this union afterwards divides into t \\ o 



11, Tendon of the perfo- branches, each of which comports itself, in regard to the 

 ratus ; 12, Suspensory liga- 

 ment of the fetlock; 13, 



The band it furnishes to the perforatus to form the ring through which the perforans 

 passes; 14, The external band it gives off to the proper extensor of the external digit; 

 15, Coraco-radialis; 16, Anterior brachial ; 17, Anconeus. 



