'HE ARTICULATIONS OF THE LOWER LIMB 



219 



Fourth lumbar vertebra 

 Vertebra lumbalis IV. 



Sacral promontory 

 Promontorium 



Posterior (short) sacro-iliac ligament 1 

 Lig. sacro-iliacum posterius breve 



Posterior sacro-iliac ligament (superficial 



layer) 2 

 Ligg. sacro-iliaca interossea 



Long or oblique (posterior) sacro-iliac 



ligament 

 Lig. sacro-iliacum postenus longum 



Anterior or small sacrosciatic ligament 

 Lig. sacrospinosum 



Posterior or great sacrosciatic ligament 



Lig. sacrotuberosum 



FIG. 454. DEEP POSTERIOR LIGAMENTS OF THE SACRO-ILIAC ARTICULATION : LIGAMENTA SACRO- 

 ILIACA INTEROSSEA, POSTERIOR SACRO-ILIAC LIGAMENTS ; LIGAMENTUM SACRO-ILIACUM POSTERIUS 

 BREVE, POSTERIOR (SHORT) SACRO-ILIAC LIGAMENT. (THE RIGHT HALF OF A PELVIS DIVIDED 

 IN THE MEDIAN PLANE ; POSTERO-INTERNAL ASPECT.) 



The upper portion of the posterior or great sacrosciatic ligament has been removed ; the long or 

 oblique (posterior) sacro-iliac ligament has been divided transversely in the middle, and the 

 ends have been turned upwards and downwards. 



'External sacral crest 



*Crista sacralis lateralis 



Sacral canal 



Canalis sacralis 



Median sacral crest 



rista sacralis 

 media 



Tuberosity of the ilium 



Tuberositas iliaca 



Auricular surface 

 Facies auricularis'v 



Sacro-iliac articulation 

 Articulatio sacro-iliaca 



Anterior sacro-iliac ligament 



Ligg. sacro-iliaca anteriora 



First sacral vertebra Vertebra sacralis I 



Deep layer \ of the posterior sacro-iliac 

 Superficial layer/ ligament- 



FIG. 455. HORIZONTAL SECTION THROUGH THE SACRO-ILIAC ARTICULATION ; UPPER SURFACE OF 

 LOWER SEGMENT: SUPERFICIAL AND DEEP LAYERS OF THE POSTERIOR SACRO-ILIAC LIGAMENT. 



The section was made in a plane at right angles to the long axis of the pelvis, and passes through 



the middle of the body of the first sacral vertebra. 

 1 This forms part of the posterior sacro-iliac ligament of English anatomists. See note on p. 218. TR. 2 See note on p. 218. 



Articulationes et ligamenta cinguli extremitatis inferioris Articulations and ligaments 



of the pelvic girdle. 



282 



