GLUTEAL REGION 



289 



round the lower border of the glutaeus maximus near the coccyx, 

 must also be remembered and traced to the sacro-tuberous liga- 

 ment, which it will be seen to pierce. 



On the right side commence the reflection in the reverse 

 manner. Raise the muscle from the ischial tuberosity and 



Nerve to quadratus femoris 

 Inferior gluteal nerve Pudendal nerve 

 Posterior cutaneous nerve of thigh Inferior glutea , artery 



iperficial part of superior gluteal artery Internal pudendal artery 



Superior gluteal nerve Nerve tQ obturator intrnus 



Deep part of sup. f 



gluteal artery 



M. gemellus superior 



M. obturator internus 

 M. gemellus inferior 



Sacro-tuberous ligament 

 M. obturator externus 



M. quadratus femoris 



(cut) 



Tuber ischiadicum 

 (ischial 

 tuberosity) 



M. glutaeus medius 



Ferve to tensor fasciae latae 

 d lateral circumflex artery 



Greater trochanter 

 VI. quadratus femoris (cut) 



Medial circumflex artery 



M. adductor magnus 



M. adductor magnus 



LM(. semimembranosus 

 . semitendinosus 

 M. biceps femoris 



FIG. 129. Dissection of the Gluteal Region. The Glutaeus Maximus and 

 the Glutaeus Medius have been removed, and the Quadratus Femoris has 

 been reflected. 



separate it first from the coccyx, then from the sacro-tuberous 

 ligament and the side of the sacrum, and finally from the ilium. 

 Even when the muscle is completely separated from the parts 

 from which it arises it still cannot be thrown towards its insertion, 

 for it is tied to its place by blood-vessels and nerves which enter 

 its deep surface. These are (i) the branches of the superficial 

 division of the superior gluteal artery, which appear at the upper 



VOL. I 19 



