COSTO-TRANSVERSE ARTICULATIONS. 



i6i 



convex vertically, are received into the hollows on the facets of the transverse pro- 

 cesses. The cavities are deepest in the upper part of the thoracic region, but the 

 facet on the first transverse process is nearly plane. In the lower part of the region 



Fig. 184. 



VII rib. 



Superior costo-trans- 

 verse ligament 



VIII rib 



Posterior costo-trans- 

 verse ligament 



IX rib 



Intervertebral 

 foramen 



L'pper part of stellate 

 ligament 



Lower part of same 



Body of ninth thoracic 

 vertebra 



Ligaments uniting ribs with spine, from before. 



these cavities are smaller and less concave, allowing freer motion. Ther^ is none 

 for the twelfth rib, and but a poor one, if any, for the eleventh. There are three 

 costo-transverse ligaments : the posterior; the middle, and the superior. The pos' 



Fig. 185. 



Lamina of vertebra above 



Transverse process 

 of vertebra below 



Middle costo- 

 transverse liga- 

 ment 



Posterior costo- 

 transverse ligament 



Costo-transverse 

 joint 



Rib 



Middle costo-trans- 

 verse ligament 



Costo-vertebral 



joint 



Interarticular liga- 

 ment 



Intervertebral disk 



Transverse section through intervertebral disk and ribs. 



terior^ are strong bands running outward from the tips of the transverse processes 

 to the rough part of the tubercle beyond the joint. The middle ' are strong short 

 fibres connecting the front of the transverse process and the back of the neck of the 



^ Lig. costotransversarium posterius. - Lig. colli costae. 



II 



