CHAPTER XXXIII. 



THE THIGH. 



MUSCLES AND THEIR ACTIONS. 

 NERVE ASSOCIATIONS. LANDMARKS. 

 BLOODVESSELS. FRACTURES. 



Relations. OPERATIONS. 



Muscles. The sartorius, from the anterior superior 

 spinous process of the ilium and from the adjacent part of 

 the notch below it; into the upper part of the inner sur- 

 face of the tibia and into the fascia of the leg. Actions. 

 (1) It flexes, slightly abducts and rotates outwards the 

 thigh; (2) flexes the knee; (3) acting from below, it 

 flexes the pelvis on the thigh. 



The pectineus, from the pectineal line between the pubic 

 spine and pectineal eminence, from the surface of bone in 

 front of the line and from the pubic portion of the fascia 

 lata; into the rough line leading from the lesser trochan- 

 ter to the linea aspera. Action. (1) It flexes and ad- 

 ducts the thigh, as in crossing the legs; (2) it acts as a 

 slight external rotator. 



The adductor brevis, from the body and descending 

 ramus of the pubes ; into the inner lip of the linea aspera, 

 from just below the lesser trochanter to the middle of the 

 back of the femur. Action. It adducts, rotates out- 

 wards and slightly flexes the thigh. 



The adductor longus, from the front of the pubes, at 

 angle of junction of crest and symphysis; into the inner 

 lip of linea aspera, about the middle third of the thigh. 

 Action. It adducts, flexes and rotates outwards the thigh. 



The adductor magnus, from the outer border of ischial 

 tuberosity, from ascending ramus of ischium and descend- 

 ing ramus of pubes ; into the line from the great trochanter 



