DISSECTING MANUAL. 



compartment (crural canal) contains lymphatics, usually some 

 fat, and is the channel for femoral hernia ; its wall is the crural 

 sheath. The upper limit (crural ring} of the canal lies in front 

 of the Pectineus, external to Gimbernat's ligament, internal to 

 the femoral vein, and behind part (superficial crural arch) of 

 Poupart's ligament ; the fascia transversalis forming the sheath 

 is thickened (deep crural arch) in front of it. The ring is filled 

 (crural septum) by a plug of fat or a lymphatic gland, and is 

 separated from the internal abdominal ring by the deep epi- 

 gastric artery. The canal is covered above by the falciform liga- 

 ment, and ends at the saphenous opening. [358] 



A femoral hernia descending through the canal, and pushing 

 the septum in front of it, is retarded in front by the falciform 

 ligament, but its posterior part continues onward and hooks 

 round this ligament; the hernia thus passes forward through 

 the saphenous opening and upward over Poupart's ligament. 

 Its coverings from without inward are skin, superficial fascia, 

 cribriform fascia, crural sheath, crural septum, extra-peritoneal 

 tissue, and peritoneum. [359] 



MUSCLES. 



Front of Thigh. 



Sartorius. Origin; anterior superior spine of ilium, and half 

 of notch below it. Insertion; inner surf ace of shaft of tibia, just 

 below inner tuberosity, by aponeurotic fibres; capsule of knee- 

 joint and fascia lata of leg by fascia! expansions from its bor- 

 ders. Course; diagonally downward and inward on the thigh, 

 its upper third forming the boundary of Scarpa's triangle, and 

 its middle third the roof of Hunter's canal ; a bursa lies under 

 its tendon of insertion. [359] 



Quadriceps Extensor. This is composed of four muscles, as 

 follows; all are finally inserted in the tibia, through the liga- 

 mentum patellae and lateral patellar ligaments. 



Rectus Femoris. Origin; (straight head) anterior inferior 



[272] 



