COSTOSTERNAL ARTICULATIONS 



287 



which radiate from the posterior surface of the sternal end of the cartilages of 

 the true ribs to the posterior surface of the sternum, becoming blended with the 

 periosteum. 



The intra-articular chondrosternal ligament (ligamentum sternocostale inter- 

 art iculare) (Fig. 233) is found between the second costal cartilage and the sternum. 

 The cartilage of the second rib is connected with the sternum by means of an 



FIG. 237. Sternum and ribs with ligaments, from in front. In the right half of the figure the most anterior 

 layer has been removed and the joint cavities have been opened; the parts are separated somewhat from one 

 another on the left side. (Spalteholz.) 



intra-articular ligament attached by one extremity to the cartilage of the second 

 rib, and by the other extremity to the cartilage which unites the first and second 

 pieces of the sternum. This articulation is provided with two synovial membranes. 

 The cartilage of the third rib is also quite frequently connected with the sternum 

 by means of an intra-articular ligament which is attached by one extremity to 

 the cartilage of the third rib, and by the other extremity to the point of junction 



