330 



FASCIA AND MUSCLES OF THE HORSE 



nishes insertion to fibers of tlie vasti. Tlie tendon of insertion is formed by the 

 union of these tendinous layers on the lower part of the muscle. The lower portion 

 of the muscle is pennate, the fibers on either side converging on the tendon at an 

 acute angle. 



Relations.— NLedially, the ihacus, sartorius, and vastus mediahs; laterally, 

 the tensor fascia latse, glutei, and vastus lateralis; posteriorly, the hip joint and 

 the vastus intermedins; anteriorly, the fascia lata and the skin. The anterior 

 femoral arter\' and branches of the femoral nerve descend into the interspace be- 



Gluteus profundus 



Vastus lateralis 



Rectus femoris 



Prepubic tendon (in 

 median section) 

 Obturator externus 



opsoas (insertion) 



Adductor 



Vastus medialis 



Medial femoro-tibial ligament 

 Medial meniscus 



Lateral patellar ligament 



Tuberosity of tibia 



Fig. 289. — Muscles of Right Thigh of Horse, Deep Dissection. The Preparation is Viewed from in Front 



AND Somewhat Medially. 

 1, Accessory ligament of hip joint; 2, transverse ligament of same; .3, head of femur; 4, patella; 5, trochlea of femur; 



6, 7, middle and medial patellar ligaments. 



tween the upper part of the rectus and the vastus medialis; similarly, the iliaco- 

 femoral artery dips in between the rectus femoris and vastus lateralis. 



Blood-supply. — Femoral and iliaco-femoral arteries. 



Nerve-supply. — Femoral nerve. 



(2) Vastus lateralis. — This lies on the lateral surface of the femur, extending 

 from the great trochanter to the patella. It is wide in its middle, smaller at each end. 



Origin. — The lateral border and surface of the femur, from the trochanter 

 major to the supracondyloid fossa. 



