54 EQUINE ANATOMY. 



superior face and external border of the patella. 

 Action : Extensor of the leg:. 



c. Vastus internus. — Attachments : Internal face 

 and internal half of the anterior face of the femur, 

 superior face and internal border of the patella. Ac- 

 tion : Extensor of the leg. 



- 3. Anterior grele. — Synonyms. Ilio-femoral grele. 

 (G). Crureus vel cruralis, (P). Attachments : Rim 

 of the ilium, superior part of the anterior face of the 

 femur. Action : Raises the capsular ligament of the 

 coxo-femoral joint. 



Posterior trural Region,— Three muscles. 



1. Long vastus. — Synonyms. Ischio-tibialis exter- 

 nus, (G). Biceps abductor femoris, (P). Anterior 

 pubio-ischio-tibialis, (L). Attachments : The anterior 

 portion to the sacral spine, sacro-sciatic ligament, 

 coccygeal aponeurosis, ischial tuberosity, behind the 

 sub-trochanterian crest and to the anterior face of the 

 patella ; the posterior portion to tlie iscliial and the 

 tibial crests. Action : Abductor of the leg and ex- 

 tensor of the tliigh ; also flexes the leg, and is a tensor 

 of the tibial aponeurosis. 



2. Semi-tendinosus. — Synonyms. Ischio-tibialis me- 

 dius or posticus, (G). Adductor tibialis, (P). Pos- 

 terior sacro-ischio-tibialis, (L). Attachments : Sacral 

 spine, sacro-ischiatic ligament, the ischial tuberosity, 



