SEMIMEMBKAXOSUS. 



233 



popliteal space, resting on the semimembranosus, and curves forwards 



to be inserted in an expanded form into the upper part of the tibia at 



its inner side. There the tendon is on 



the same plane with, but below that of Kg- 1S6. 



the gracilis, both being under cover of 



the sartorius. A thin oblique tendinous 



intersection traverses the muscle about 



the middle. 



Fig. 186. — Deep Muscles of the Right Hip 

 AND Thigh, from behini>. (A.T.) i 



a, anterior, a', posterior superior spine of 

 tlie ilium ; V, posterior inferior spine ; c, c, 

 great and small trochanter ; d, symphysis pubis ; 

 e, tuberosity of the ischium ; /, popliteal surface 

 of the femur ; r/, head of the fibula ; 1, gluteus 

 minimus ; 2, obturator intemus : the gemelli 

 muscles have been removed ; 3, obturator ex- 

 ternus ; 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 perforating vessels ; 5'', tendon 

 of insertion into the inner tulierosity of the 

 femur ; between the lower 5' and 5", the inter- 

 val through which the femoral vessels pass into 

 the i)opliteal space ; the iipper 5' is placed upon 

 the cut end of the quadratus femoris ; 6, A-astus 

 externus ; 7, vastus internus ; 8, femoral head of 

 the biceps femoris : the lower part is represented 

 as passing too far inwards ; 8', its ischial head, 

 cut short ; 9, plantaris muscle : at its u^jper 

 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 semimenilbranosiis muscle 

 arises from the tuberosit}^ of the 

 ischium, above and to the outside of 

 the origin of the biceps and semi- 

 tendinosus, by a strong flattened ten- 

 don, two or three inches long, which, 

 as it descends in front of the common 

 tendon of those two nuiscles, passes 

 to their inner side. The muscle pre- 

 sents inferiorly a thick fleshy belly, 

 ending in a short flattened tendou, 

 which is inserted in three parts : the 

 principal part turns forwards and is 

 inserted into a well-marked groove on 

 the inner tuberosity of the tibia, beneath the internal lateral ligament 

 of the knee-joint, some of its fibres joining that ligament ; a second 

 part, passing downwards and outwards, expands in the aponeurosis 

 over the popliteus muscle ; and the remaining'fibres are directed upwards 

 and outwards, and blend with the posteriorligament of the knee-joint, 



