6S The Anatomy ^/^ HORSE. Chap. y. 



^nvo pair 'which The tvvo Pair ot Mufclcs which bring 

 bring the Shoul the Shoulder forward, are called the one hy 

 derforiuards, the Name of P^^^rj//j, and the other Co- 

 TMoidem. The Fe5loralis is fo called from i:s Situation on 

 the Forefide of the Breaft. It arifes from the middle of 

 the Collar-bone ; its middle proceeds from the whole 

 Length of the Breaft. bone, and the Ends of the Qriftles of 

 all thofe Ribs which terminate in it ; and its lower part 

 fprings from the lixth, feventh, and eighth Ribs. Its In- 

 fertion is with a broad and finewy Tendon into the Shoul- 

 der-bone, a little below its Head. 



The Coramdeus has its Beginning from the Procejfus 

 CoracoideSy from whence it reaches to the middle of the 

 Shoulder-bone, where it terminates. The Ufe of this and 

 the former is to draw the Shoulder forward. 

 fj,, ^ The following three Mufcles, to wit, the 



baekn.vards Infrafpinatiis^ Subjcapularis^ and Rotundas 



minor ^ move the Shoulder backward. 

 The Infra/pin at us arifes from the Bafis of the Blade be- 

 low its Ridge, and is inferted by a broad and fhort Tendon 

 into the fourth Ligament of the Shoulder- bone. 



The Subfcapularis is feated between the Scapula and 

 Ribs, and is inferted into one of the Ligaments of the 

 Shoulder ; and the Rotundus miiior^ which arifes from the 

 lower Corner of the Scapula, is implanted into the Neck 

 of the Slioulder bone. 



As to the circular Motion of the Shoulder, that is not 

 performed by any fingle Mufcle, but by feveral of thefe 

 alieady name(J, a6!ing fucceffively one after another, which 

 is eafily enough to be conceived by thofe who carefully ob- 

 ferve their Origins and Infertions, and the various Direc- 

 tions of their P'ibres. But we (hall now proceed to thofe 

 that move the Fore-leg and Foot. 



The Fore leg is bended by two Mufcles, 

 /' 5 i r to wit, the Biceps, and Brachiaus iniernus, 



tend the tore- Ths Biceps, fo Called from its double 



Head or Beginning, arilmg partly from the 

 upper Brim of the Shoulder-blade, and partly from the 

 Anchor-like Procefs of the fame Bone. This Mufcle be- 

 Cometh ftrong and flefhy, and runs all along the Infide of 

 the Cubit-bone to the Knee, where it is inferted. Its Of- 

 fice is to- bend the Cubit forward and fomewhat inwards. 



The fecond, or Srachiaus internus, fo called in Man, 

 ixom its Situation on the Infide of the Arm, and may 



pro- 



