16 LIGAMENTS AND MUSCLES OF THE HORSE. 



Synovial Membranes. 



These are three in number : — 



(a ) Radio-carpal. — Which lubricates the joint between the 

 radius and the upper row of carpal bones, also descending 

 between the latter. 

 (6.) Intrr-carpal. — Which lubricates the joint between the two 

 rows, and has prolongations upwards and downwards be- 

 tween the bones. It communicates with the 

 (c.) Carpo-meiacaipal. — Which lubricates the joint between the 

 lower row and the heads of the metacarpals, sending 

 pouches down for the facets on tlie large and small meta 

 c irpals. 

 Movements. 



riexi >n and extension. When the limb is flexed, also abduc- 

 tion and adduction. The movement is principally at the 

 r<idi()-cai-prd joint, least at the carpo-metacarpal. 



FETLOCK JOINT. 



(Metacarpu-phalangeal. ) 

 A Prop::f. 



1. Anterior — {Membranous.) attached above to the large meta- 



carpal, below, to the os suffraginis, l^lending laterally witii 

 the lateral ligaments. 



2. External Lateral. 



3. I7ii^;hal Lateral. — Each attached above to a depression on 



t]^ large metacarpal, below, to the upper extremity of the 

 OS suffraginis and to the sesamoid. 

 B. AccESSory. (Sesamoidean ligaments.) 



1. Superior or S '.spensary. — This important ligament originates 

 behind the carpus, from the lower row of carpal bones, and 

 from the upper part of the large metaca' pal ; bifurcating 

 above tlie sesamoids, eacli biM.nch gives fibres to the sesa- 

 moid, and passes downwards and forwards to join the 



