172 



Joints of the Thorax. 



Ligamentum tuberculi costae 



Ligauientum costotrans- 

 versarium posterius 



Ligamentum 

 intertransversarium 



Processus articularis superior 



Processus transversus 



Processus spinosus 

 (apex removed) 



_ - Ligamentum costotransversarium anterius 

 Costa 



224. Ribs and corresponding vertebrae with 



ligaments, viewed from behind aud somewhat from the right. 



The articulationes costotransyersariae (see also Figs. 212, 222, 223, 



225) are formed on the first to the tenth rib by the apposition of each fades articu- 

 laris tuberculi costae to the fovea costalis transversalis of the vertebra pertaining to 

 the rib, so that for example, the tubercle of the sixth rib is connected with the trans- 

 verse process of the sixth thoracic vertebra. The margins of the cartilaginous joint 

 surfaces are connected by capsulae articulares. Extending as a strengthening ligament 

 from the under surface of the next transverse process above is the strong, quadrangular 

 lig amentum costotransversarium anterius, which passes obliquely downward and 

 median ward to the crista colli; behind this the feebler, triangular I ig amentum costo- 

 transversarium posterius runs from the root of the processus spinosus and from the 

 root of the processus transversus of the next vertebra above obliquely lateralward and 

 downward to the posterior surface of the collum costae and to the region above the 

 tuberculum costae. 



