270 



FASCIA AND MUSCLES OF THE HORSE 



behind the lateral ligaments; (2) the distal extremity of the first phalanx, also 

 behind the lateral ligaments. 



Action. — To flex the digit and carpus, and to extend the elbow. 



Fio. 195. — Synovial Sheaths and Bltrsa: of Lower 

 Part of Right Fork Limd of IIorsk, Intkr- 



NAL ViKW. 



The synovial sheaths (colored yellow) ami t 

 a, Sheath of extensor carpi obli<iuus; 6, sheath 

 of flexor carpi internus; c, carpal sheath; d, d' , d" ,d"' , 

 digital sheath; e, bursa under anterior extensor ten- 

 don; /, capsule of fetlock joint; /, extensor carpi 

 radialis; 2, tendon of extensor carpi obliciuus; 3, 

 flexor carpi internus; 4. flexor carpi medius; 5, superfi- 

 cial flexor tendon; 6, tleep flexor tendon; 7 , suspensory 

 ligament; 8, small metacarpal bone; 9, large meta- 

 carpal bone; /O, jiDsterior ammlar liKament of fetlock; 

 i/, proximal dipilal annular lijjamcnt ; 12, ratlins; IS, 

 radiocarpal joint; IJf, fetlock joint; 15, lateral cartilage; 

 16, band from first phalanx trj lateral cartilage. (After 

 Ellenberger, in Leisering's Atlaa.) 



Fig. 196. — Svnoviai- Shkatiis and Blrs.e of Lower 

 Part of Right Fore Limb of Horse, Exter- 

 nal View. 

 he joint capsules (colored pink) are injected. 



ti. Sheath of extensor carpi radialis; b, shealh 

 of anterior extensor; c, sheath of lateral extensor; d, 

 sheath of outer tendon of flexor carpi externus; e, e' , 

 carpal sheath; /, /', /", digital sheath; g, bursa under 

 anterior extensor tendon; h, bursa under lateral ex- 

 ten.sor tendon; (', capsule of fetlock joint; /, extensor 

 carpi radialis; 2, anterior digital extensor; S, lateral 

 digital exten.sor; 4< flexor carpi externus; 4'< 4" > 

 tendons of 4! 5, superficial flexor tendon; 6, deep 

 flexor tendon; 7, suspensory ligament; S, external 

 metacarpal bone; 9, large metacarpal bone; 10, 

 posterior annular ligament of fetlock; //.digital annular 

 ligament; IS. fetlock joint; 13, lateral cartilage; 14, 

 band from first phalanx to lateral cartilage. (.Vfter 

 Ellenberger, in Leisering's .\tlas.) 



Structure. — The fleshy portion of the muscle or humeral head takes origin 

 from the humerus. The radial head (C';ii)ut tcndineuTn) consists of a strong fibrous 

 band, usually termed the radial or superior check ligament, which fuses with the 



