DISSECTING MANUAL 



Lumbo-sacral. This joint between the last lumbar verte- 

 bra and the sacrum follows exactly the above vertebral type. 

 It has also an accessory lateral lumbo-sacral ligament which runs 

 from the front of the inferior border of the last lumbar trans- 

 verse process, downward and outward to the front of the lat- 

 eral aspect of the ala of the sacrum. Another (inconstant) 

 band may run from the lower part of the side of the body of 

 the last lumbar vertebra to the anterior surface of the ala of 

 the sacrum. [289] 



Sacro-coccygeal. There is an intervertebral disc between 

 the sacrum and coccyx, and also the following ligaments : an- 

 terior, a continuation of the anterior common ligament; pos- 

 terior, descending from the edge of the lower opening of the 

 sacral canal; lateral, on each side; and interarticular, strong 

 bands connecting the cornua. [264] 



Inter-coccygeal. When separate, the coccygeal segments 

 are united by intervertebral discs, and anterior and posterior 

 ligaments. [264] 



S aero-iliac. There is a diarthrosis between the articular 

 surfaces of the sacrum and ilium on each side. Fibrous bands 

 may cross the capillary joint interval. There is a capsule (with 

 a rudimentary synovial cavity) formed by the following liga- 

 ments : Anterior sacro-iliac : short fibres connecting adjoining 

 surfaces of the sacral ala and the iliac fossa. Short posterior 

 sacro-iliac: strong fasciculi running from the rough area on 

 the ilium, above and behind its articular surface, downward 

 and inward to the transverse tubercles and the depressions 

 behind the first two sacral segments. Long (oblique) posterior 

 sacro-iliac : a special superficial band of the preceding, running 

 from the postero-superior iliac spine to the transverse tubercles 

 of the third and fourth sacral segments. [290] 



The accessory ligaments are the following: Ilio-lumbar : this 

 is the thickened anterior lamina of lumbar fascia which runs, 

 from the tip of the last lumbar transverse process, outward to 

 the inner lip of the iliac crest, just behind its highest level, and 



[188] 



