6 THE POCKET ANATOMY 



The superior fasciculi pass obliquely upwards, the inferior 

 downwards, and the middle horizontally. 



The posterior chondro-sternal ligament is an indistinct 

 band of fibres radiating from the posterior surface of the 

 inner end of the costal cartilage to the back of the sternum. 



The capsular ligament surrounds the joint, and encloses a 

 synovial membrane (In the ist there is no synovial mem- 

 brane ; in the 2nd and 3rd there are 2, the joint being divided 

 by an interarticular ligament passing between end of the 

 costal cartilage and cartilage between adjacent pieces of the 

 sternum. (The 4th, 5th, 6th, and yth have one each.) 



VIII. ARTICULATIONS OF THE CARTILAGES OF THE RIBS WITH 

 EACH OTHER. 



The cartilages of the 6th, yth, and 8th ribs articulate with 

 each other by an oval shaped facet, each having a capsule 

 enclosing a synovial membrane. 



IX. ARTICULATIONS OF THE RIBS WITH THEIR CARTILAGES. 



The costal end of each cartilage fits into a depression in the 

 sternal end of the rib, and is bound down by periosteum. 



X. ARTICULATIONS OF THE STERNUM. 



The ist and 2nd pieces are united by a piece of cartilage, 

 kept together by the following two ligaments : 



The anterior intersternal ligament consists of longitudinal 

 fibres, which blend with the costo-sternal ligaments. 



The posterior intersternal ligament: similar to the pre- 

 ceding, placed on the back of the sternum. 



XI. ARTICULATION OF THE PELVIS WITH THE SPINE. 



The following ligamentsconnect the 5th lumbar vertebra with 

 the sacrum, and are similar to the common vertebral ones : 



1. The continuations of the anterior and posterior common 

 ligaments. 



2. The intervertebral substance between the last lumbar 

 vertebra and the sacrum. 



3. The ligamenta subflava between the laminae of the last 

 lumbar vertebra and the margins of upper opening of the 

 sacral canal. 



4. Capsular ligaments, between the articular processes. 



5. Interspinous and supraspinous ligaments. 



Besides these, there are the following special ligaments : 

 The lumbo-sacral or sacro-vertebral ligament: attached 

 above to the front of tip of transverse process of the 5th 



