180 



THE ARTICULATIONS OF THE TRUNK 



Fourth sacral vertebra . 

 Vertebra sacralis IV. 



Anterior or small sacrosciatic ligament 

 Lig. sacrospinosum 



Anterior sacrococcygeal ligament < 

 Lig. sacrococcygeum anterius 



Fourth anterior sacral foramen 



Foramen sacrale anterius IV. 



_ Sacrococcygeal symphysis 



Symphysis sacrococcygea 



Lateral coccygeal ligament 



Lig. coccygeum laterale 



Apertures in the posterior aponeurosis of the 



levatores ani muscle for the passage of the 



middle sacral vessels 



r I A 



Prolongations of the anterior sacrococcygeal ligament 



into the tendons of the pubococcygeal portions of the 



levatores ani muscles 



FIG. 405. THE LIGAMENTS CONNECTING THE ANTERIOR SURFACES OF THE SACRUM AND COCCYX 

 THE ANTERIOR AND THE LATERAL SACROCOCCYGEAL LIGAMENTS. 



, * Articular sacral crests 

 /\*Criste sacrales articulares 



/ 

 'Median sacral crest 



*Crista sacralis media ... 



Lateral sacrococcygeal ligament 

 Lig. sacrococcygeum laterale 



Interarticular sacrococcygeal ligament 

 Lig. sacrococcygeum articulare 



Superficial posterior sacrococcygeal ligament 

 Lig. sacrococcygeum posterius superficiale 



Deep posterior sacrococcygeal ligament 

 Lig. sacrococcygeum posterius profundum 



Fourth posterior sacral foramen 



Foramen sacrale posterius IV. 



Sacral cornu 

 Cornu sacrale 



Coccygeal cornu 



Cornu coccygeum 



First coccygeal vertebra 

 Vertebra coccygea I. 



/i 



FIG. 406. THE LIGAMENTS CONNF.CTING THE POSTERIOR SURFACES OF THE SACRUM AND COCCYX: 

 THE SUPERFICIAL AND DEEP POSTERIOR SACROCOCCYGKAL LIGAMENTS, AND THE INTERARTICULAR 

 AND LATERAL SACROCOCCYGEAL LIGAMENTS. 



THE COCCYX WITH THE Two LAST SACRAL VERTEBR/E. 

 Ligamenta columnar vertebralis The ligaments of the vertebral column. 



