1178 



SURGICAL AND TOPOGRAPHICAL ANATOMY 



wards, lies behind its companion at the apex of the triangle, and below lies some- 

 what to its outer side. 



From the apex of Scarpa's triangle a depression runs down along the inner 

 aspect of the thigh, corresponding to the groove already mentioned (page 1175) 

 between the vastus internus and the adductors. Along this groove lies the sartorius, 

 and beneath it Hunter's canal. The vein has here got somewhat to the outer 

 side. The long saphenous nerve lies also in the canal, but not in the sheath. The 

 above-mentioned space terminates at about the junction of the middle and lower 

 thirds of the thigh, in the opening in the adductor magnus by which the artery 

 enters the upper and inner part of the popliteal space. The long saphenous, the 

 largest branch of the anterior crural nerve, having crossed the femoral vessels 

 from without inwards, accompanies them as far as the opening in the adductor 



Fig. 744— Section of Thigh through lppee part of Hunter's Canal. (W. A.) 



Lymph spaces 



LONG SAPHE- 

 NOUS NERVE 



Femoral artery, vitk 



small ven(e comites 



( femoral vein deeper) 



Shealh of vessels 



Long saphenous vein 



Lymph spaces 

 Superficial fascia 



Deep fascia contin- 

 ued over back of 

 Thigh as superfi- 

 cial layer of deep 

 fascia 



Middle layer of 

 deep fascia 



Deep layer of deep 

 fascia (muscular 

 aponeurosis; 



GREA T SCI A TIC NER VE Vein 



magnus. Here it perforates the aponeurotic roof, and is prolonged under the 

 sartorius, accompanied by the superficial part of the anastomotic artery, to per- 

 forate the fascia lata between the sartorius and gracilis, and run with the long 

 saphena vein at the upper and inner part of the leg. 



Pressure may be applied to the femoral artery — (1) Immediately below Poupart's 

 ligament: it should here be directed backwards so as to compress the vessel against 

 the brim of the pelvis and the capsule of the hip-joint; (2) at the apex of Scarpa's 

 triangle, the pressure here being directed outwards and a little backwards, so as to 

 command the vessel against the bone; (3) in Hunter's canal the pressure should 

 be directed outwards with the same object. Care must be taken, especialh'' above, 

 to avoid the vein, Avhich lies very close to the artery, and also the anterior crural 

 nerve, which enters the thigh a])OUt half an inch (12 mm.) outside the artery, and 

 at once breaks up into its branches, superficial and deep. 



