THE HIP-BOXE 



141 



The tuberosity is that portion of the ischium which supports the body in the 

 sitting posture. It is divided into an anterior and a posterior part by a transverse 

 line. The j)osterior portion is subdivided by an oblique ridge into an upper and 

 outer part for the semimembranosus, and a lower and inner part for the common 

 tendon of the biceps and the semitendinosus. The anterior portion is separated 

 into an inner and outer section by an antero-posterior line, the outer part gives 

 origin to the posterior part of the adductor magnus, and the inner part serves for 



Fig. 15-2. — Tin: Lkft Hip-bone. ( Posterior view. 



Posterior limit of external oblique 



Insertion of 

 external oblique 



Internal oblique 



XiatisEimus dorsi 



CREST OF ILIUM 



SUPERIOR GLUTEAL 

 RIDGE 



Rectus femoris 



INFERIOR ILIAC 

 NOTCH 



ARTICULAR PORTION OF 

 COTYLOID CAVITY 



PECTINEAL RICCE 



Peetiaeus 



Rectus 

 abdominis 

 Pyramidalis 

 Adductor 



longus 



Adductor 



brevis 



DESCENDING RAMUS 

 OF PUBES 



Gracilis 



LESSER SCIATIC NOTCH 

 Gemellus inferior 



OBTURATOR NOTCH 

 Semimembranosus 



QuadrEtus femoris 



Semitendinosus 

 and biceps 



Adductor magnv 



RAMUS OF ISCHIUM Obturator c-ternus 



the iittachincnt of part of the falciform process of the great sacro-sciatic ligamer.t. 

 The surface of the tul^erosity aljove this lip is in relation with the internal pudic 

 vessels and nerves. The outer lip is occupied by the quadratti>>f('iiiorif< muscle, and 

 the surface adjacent to this is occupied by the adductor magnus. The surfaces thin 

 away to a sharp margin, Avhich forms part of the boundary of the obturator foramen. 

 The ramus of the ischium is a continuation of the tuberosity running upwards 

 to join the descending ramus of the pubes, to complete the obturator foramen. The 

 outer surface of the ramus gives origin to the adductor magnus and the obturator 



