64 



EQUINE ANATOMY, 



psoas mns- 



Vi 



tlie subsacral blood vessels, outwards and in front with 

 the gluteal vessels. The anterior portion ends in the 

 <irural and obturator nerves, and gives off the iliaco- 

 muscular. The posterior is continued by the great 

 sciatic and external popliteal-sciatic nerves, after giving 

 ■off the small sciatic including the anterior and posterior 



^■^^frftiAtJO-mjscuLAR. — Ramifying in the ps 

 -cles. 



2. Crural or anterior femoral. — Descends be- 

 tween the small and the great psoas to terminate in 

 the triceps cruralis muscle. Collateral branches : Ac- 

 cessory of the internal saphena and the internal saphena, 

 both becoming sub-cutaneous before terminating. 



3. Obturator. — Runs alongside the obturator artery 

 under the internal obturator muscle throuo^h the obtu- 

 rator foramen, and ramifies in the deep muscles of 



w^l the internal crural region. 



4. Small sciatic or anterior and posterior glu- 

 teal. — Anterior gluteal or ilio-rauscular : Four or 

 five branches from the two first sacral pairs, going to 

 the middle gluteus muscle. Posterior gluteal or ischio- 

 muscular : Two in number ; one, superior, goes to the 

 long vastus ; and one, inferior, passes under that muscle, 

 and the semitendinosus towards the ischial tuberosity, 

 where it ends in cutaneous branches. 



