us 



TITK AXATO:\rY OF TTTE HORSE 



Flkxor MKTACAnn EXTF-RNUs is situatcd upon the postcro external side of 



tlie arm. Or'ujln — from a ridge on tlic external surface of the heel process 



of the external condyle of the humerus. Insertion — bifid : one to the 



supcro-posterior part of the pisiform bone ; the other 



passes through a sheath to the head of the external 



small metacarpal bone. Action — to flex the leg. 



Flexor metacarpi medius lies on the postero- 

 internal part of the arm. Or'ujin — bifid : one from 

 the middle of a ridge extending along the internal 

 condyle of the humerus ; the other from the supero- 

 intcrnal and posterior part of the ulna. Insertion — 

 bilid : one part to the supero-posterior part of the 

 OS pisifoiinc, and to the posterior annular ligament ; 

 the other to the posterointernal part of the head 

 of the inner small metacarpal bone. Action — to 

 Ilex the leg. 



Flexor metacarpi internus is situated on the 

 posterointernal side of the arm. Orit/in — from a 

 ridge behind the internal condyle of the humerus. 

 Insertion — to the head of the os metacarpi parvuni : 

 previous to its insertion, it enters a sheath formed 

 by the annular ligament. Action — to flex the leg. 



Flexor pedis perforans et perforatus is situ- 

 ated on the posterior part of the arm. Origin — 

 common to both muscles, from a ridge on the heel 

 process of the internal condyle of the humerus. 

 Insertion — of perforatus bifid, to the external and 

 internal border of the supero-posterior part of the 

 OS coronas. Insertion — of perforans ; after receiving 

 a strong bundle of ligamentous fibres from the pos- 

 terior carpal ligament, it pierces the two divisions 

 of the flexor perforatus, opposite the pastern, and 

 spreading out is attached to the postero-inferior part 

 of the OS pedis. Action — to flex the knee, and bend 

 the fetlock and pastern joints. 



Ulnaris accessorius is deeply seated at the pos- 

 terior part of the arm. Origin — from the whole of 

 the internal concave surface of the ulna. Insertion 

 — to the tendon of the flexor jicdis, with which it 



Fio. C4.— Axtero-external View of tue Muscles of tue Fore-Leo. 



Antca sjiinatus. 



Postea sjiinatus. 



4. Seajiulo huuicralis cxtenms. 



Teres exterims. 



Tricejis extensor braohii (cajmt iiingnum). 



Pectoralis tninsversus, (liviilod. 



Triceps extensor bracbii ;caiiut medium). 



Flexor brachii. 



Extensor metiicarjii magnus. 



Humeralis externus. 



Extensor pedis : a. tendon ; 6. band from external lateral ligament ; c 



insertion. 

 Extensor suffi-aginis. 

 Flexor niotacirpi extenius. 

 Extensor nietacar]>i obliquus. 



