45 6 



PRACTICAL ANATOMY. 



Symphysis Pubis : 



Class. Amphiarthrosis, because of union by cartilage and slight motion. 



Ostcological lUements. The bodies of the two pubic bones. 



Ligaments. Anterior, posterior, superior, inferior, and interosseous cartilage. 



Is there any difference bcticeen this joint in tlic tico sexes? 



The joint is shorter and broader in the female than in the male. (Fig. 324.) 



Is the nerve-supply of the sympliy sis pubis ice// understood / 



No ; but it probably is derived from the ilio-inguinal, ilio-hypogastric, and 



internal pudic nerves. 



From ivhat source does this articulation derive its blood-supply / 



From the internal pudic, the obturator, deep epigastric, internal circumflex, 



iliac, and external pudic arteries. 



Foramen for last 



lumbar nerve 

 Intervertebral body 

 between last lum- 

 bar and first sacral 

 vertebrae 



Foramen for anterior primary branch of fourth 

 lumbar nerve 



The ilio-lumbar 

 ligament 



The sacro-lumbar 

 ligament 



Superior sacro-iliac 

 ligament 



Anterior sacro-iliac 

 ligament 



Great aacro- sciatic 

 ligament 



Lesser sacro-sciatic 

 ligament 



Fiu. 327. ANTERIOR VIEW OK 1111. 



Wlial influence has pregnancy on t/ic interosseous cartilage beticeen the pubic 

 bones ? 



The cartilage becomes softer and the blood-supply more abundant. 



Is there any special difference in tlic hiterosseons cartilage in /lie male and 

 female f 



It is thicker in the female than in the male. 



\Vliat is sympliysotomy or sympliysiotomy .' 



Cutting through the pubic symphysis to increase tin- conjugate diameters of 

 the pelvic canal. In this obstetric operation all the ligaments of the symphysis 

 pubis are cut. 



Sacro-iliac Articulation and Its Ligaments : 



Class. AmphiarthroMs, bones united by cartilage and slight motion. 



