270 



MUSCLES OF THE LOWER LIMB. 



of the femur to bo inserted into the trochauteric fossa below the obturator 

 interims and geinelli. 



POSTERIOR FEMORAL REGION. 



(The Hamstring Muscles). 



At the back of the thigh are three 

 long flexor muscles of the knee-joint, 

 viz., the biceps, semitendinosus, and 

 semimembranosus. 



The biceps flexor cruris consists of two 

 parts, arising one from the hip-bone, 

 the other from the femur, and uniting 

 inferiorly to terminate an the fibula. 

 The long head arises by a tendon com- 

 mon to it and the semitendinosus from 

 the most prominent part of the ischial 

 tuberosity, and the muscular fibres ter- 

 minate below the middle of the thigh in 

 an aponeurosis which is continued down 

 into the tendon of insertion. The short 

 head arises from the rough surface of the 

 linea aspera in its whole extent, from a 

 part of the line leading from thence to 



Fig. 208. DEEP MUSCLES OP THE RIGHT HIP 

 AND THIGH, FROM BEHIND. 



a, anterior, a', posterior superior spine of 

 the ilium ; b\ posterior inferior spine ; c, c, 

 great and small trochanter; d, symphysispubis; 

 c, tuberosity of the ischium ; /, flat or popli- 

 teal surface of the femur ; g, head of the 

 fibula ; 1, gluteus minimus ; 2, obturator in- 

 ternus passing out of the pelvis by the lesser 

 sciatic notch to the digital fossa of the tro- 

 chanter : the gemelli muscles have been re- 

 moved ; 3, obturator externus ; 4, small part 

 of the back of the pectineus and adductor 

 brevis ; 5, origin of the adductor magnus 

 from the lower part of the ischial tuberosity ; 

 5', 5', line of insertion of this muscle on the 

 linea aspera, in which are seen three arched 

 tendinous intervals for the passage of the per- 

 forating vessels ; 5", tendon of insertion into 

 the inner tuberosity of the femur ; between the 

 lower 5' and 5", the interval through which 

 the femoral vessels pass into the popliteal space ; 

 the upper 5' is placed upon the cut end of 

 quadratus femoris ; 6, vastus externus ; 7, 

 vastus internus ; 8, femoral head of the biceps 

 femoris : the lower part is represented as pass- 

 ing too far inwards ; 8', its ischial head, cut 

 short ; 9, plantaris muscle : at its upper end 

 the outer head of the gastrocnemius ; the 

 figure 5" is upon the cut inner head ; 10, pop- 

 liteus, cut short below ; 11, tendon of the semi- 

 membranosus; 12, upper part of the soleus. 



the outer condyle, and from a part of the adjacent flat surface of the femur ; 



