223 



SAKTORIUS AND RECTUS. 



Fig. 90.* 



lata, gluteus medius, rectus and vastus externus. By its inner border, 

 near its origin, with the sartorius. 



The Sartorius (tailor's muscle) is a long riband-like muscle, 

 arising from the anterior superior spinous pro- 

 cess of the ilium, and from the notch imme- 

 diately below that process ; it crosses obliquely 

 the upper third of the thigh, descends behind the 

 inner condyle of the femur, and is inserted by an 

 aponeurotio expansion into the inner tuberosity 

 of the tibia. This expansion covers in the inser- 

 tion of the tendons of the gracilis and semi-ten- 

 dinosus muscles. The inner border of the 

 sartorius muscle is the guide to the operation 

 for tying the femoral artery in the middle of its 

 course. 



Relations. By its superficial surface with the 

 fascia lata arid some cutaneous nerves. By its 

 deep surface with the psoas and iliacus, rectus, 

 sheath of the femoral vessels and saphenous 

 nerves, vastus internus, adductor longus, adduc- 

 tor magnus, gracilis, long saphenous nerve, 

 internal lateral ligament of the knee-joint. By 

 its expanded insertion with the tendons of the 

 gracilis and semi-tendinosus, a synovial bursa 

 being interposed. At the knee-joint its posterior' 

 border is in relation with the internal saphenous 

 vein- At the upper third of the thigh the sar- 

 torius forms, with the lower border of the 

 adductor longus, an isosceles triangle, whereof 

 the base corresponds with Poupart's ligament. 

 A perpendicular line, drawn from the middle of 

 the base to the apex of this triangle, immediately 

 overlies the femoral artery with its sheath. 

 The Rectus (straight) muscle is fusiform in its shape and bipenni- 

 form in the disposition of its fibres. It arises by two round tendons 

 one from the anterior inferior spinous process of -the ilium, -the 

 other from the upper lip of the acetabulum. It is inserted by a 

 broad and strong tendon, into the upper border of the patella. Jt 

 is more correct to consider the patella as a sesamoid bone, developed 

 within the tendon of the rectus ; and the ligamentum patellas as the 

 continuation of the tendon to its insertion into the spine of the tibia. 

 Relations. By its superficial surface with the gluteus medius, 

 psoas and iliacus, sartorius ; and for the lower three-fourths of its 

 extent, with the fascia lata. By its deep surface with the capsule 



* The muscles of the anterior femoral region. 1. The crest of the ilium. 2. Its 

 anterior superior spinous process. 3. The gluteus medius. 4. The tensor vaginm 

 femoris ; its insertion into the fascia lata is shown inferiorly. 5. The sartorius. 6. 

 The rectus. 7. The vastus externus. 8. The vastus internus. !). The patella. 10. 

 The iliacus internus. 11. The psoas magnus. 12. The pectineus. 13. The adductor 

 longus. 14. Part of the adductor magnus. 1:5. The gracilis. 



