330 FASCLE AND MUSCLES OF THE HORSE 
nishes insertion to fibers of the vasti. The 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—Medially, the iliacus, sartorius, and vastus medialis; laterally, 
the tensor fascixe late, glutei, and vastus lateralis; posteriorly, the hip joint and 
the vastus intermedius; anteriorly, the fascia lata and the skin. The anterior 
femoral artery and branches of the femoral nerve descend into the interspace be- 
—\5_ Shaft of ilium 
v- Medial tendon of origin 
of rectus femoris 
\Prepubic tendon (in 
median section) 
Obturator externus 
Gluteus profundus 
~ Iliopsoas (insertion) 
Vastus lateralis —~ Adductor 
Rectus femoris Vastus medialis 
Medial femoro-tibial ligament 
Lateral patellar ligament Whedsaliiennecae 
Tuberosity of tibia - 
Fic. 289.—Muscuies or Ricut Tuicu oF Horse, Deer Dissection. THE PREPARATION IS VIEWED FROM IN FRONT 
AND SOMEWHAT MEDIALLY. 
1, Accessory ligament of hip joint; 2, transverse hgament 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. hi 
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. 
