404 



THE MUSCULAE SYSTEM. 



planes, the iliac portion being in front of the sheath of the femoral vessels, while 

 the pectineal fascia is behind it. The superior cornu of the fossa ovalis, placed 

 in front of the sheath, is derived solely from the iliac portion of the fascia lata. It 

 forms a strong triangular band of fascia known as the falciform margin, attached 

 above to the medial half of the inguinal ligament. It has an important share in 

 directing the course of a femoral hernia upwards on to the abdominal wall. 



On the medial side of the thigh the fascia lata is thin where it covers the 

 adductor muscles. At the knee it is associated with the tendons of the vasti 

 muscles, and forms the collateral ligaments of the patella, attached to the borders of 

 the patella and to the condyles of the tibia. On the lateral side of the thigh it 



OBLIQUUS ABDOMINIS 

 EXTERNUS (reflected) 



Spermatic funiculi 

 Intercolumiiar fasc 



OBLIQUUS ABDOMINIS 

 EXTERNUS 



OBLIQUUS ABDOMINIS 

 INTERNUS 



Superior anterior 

 iliac spine 



TRANSVERSUS 

 ABDOMINIS 



OBLIQUUS ABDOMINIS 

 INTERNUS (reflected) 



Aponeurosis of obliquus 

 externus (reflected) 

 Abdominal inguinal ring 

 Spermatic funiculus and 

 infundibuliform fascia 

 Fascia transversalis 



Inguinal aponeurotic 

 falx 



-Fossa ovalb 



Great saphenous vein 



FIG. 359. THE DISSECTION OF THE LEFT INGUINAL CANAL. 



forms the tractus iliotibialis a broad thick layer of fascia which is attached above 

 to the iliac crest, and receives the insertions of the tensor fasciae latse, and part of 

 the glutseus maximus muscles ; its distal attachment is to the capsule of the knee- 

 joint and the lateral condyle of the tibia. A strong band of fascia continued 

 proximally from the ilio-tibial tract, beneath the tensor fascise latse muscle, joins 

 the tendon of origin of the rectus femoris and the capsule of the hip-joint. 



On either side of the thigh above the knee an intermuscular septum is formed. 

 The lateral intermuscular septum extends medially from the ilio-tibial tract to the 

 lateral epicondylic line and linea aspera of the femur, and gives attachment to 

 the vastus lateralis and vastus interrnedius anteriorly, and the short head of 

 the biceps posteriorly. The medial intermuscular septum in the distal third of the 

 thigh is associated with, and to a large extent represented by, the tendon of insertion 

 of the adductor magnus muscle. It is also related to the fascia which envelops the 



