268 



THE INFERIOR EXTREMITY 



(4) The terminal twig, called the fourth perforating artery, 

 pierces the adductor magnus in the middle third of the thigh. 



The branches which spring from the profunda femoris 

 are : the two femoral circumflex arteries, the four perforating 

 arteries, and some muscular branches. 



The lateral femoral circumflex artery arises from the lateral 

 aspect of the profunda, close to its origin. It has already 

 been followed to its distribution (p. 260). The medial 



. rectus femoris (straight head of origin) 



M. rectus femoris (reflected head of origin) 

 Attachment of the lig. 



ilio-femorale M. adductor longus (origin) 



M. pyramidalis abdominis (orij 

 M. rectus abdominis (ori| 



M. semimem 



branosus (origin) 



M. quadratus 



femoris (origin) 



Mm. biceps and 



semitendinosus 



(origin) 



M. gracilis (origin) 



M. adductor brevis (origin) 



FlG. 119. External Surface of the Os Pubis and Ischium, 

 with Attachments of Muscles mapped out. 



femoral circumflex artery which takes origin at the same 

 level, but from the medial and posterior aspect of the pro- 

 funda, will be studied when the pectineus muscle is reflected. 

 The medial femoral circumflex artery frequently arises from 

 the femoral trunk. The muscular branches are irregular both 

 in origin and size. They supply the adductor muscles, and give 

 twigs which pierce the adductor magnus to reach the ham- 

 string muscles. 



Arterise Perforantes. The perforating arteries arise in 



