RIB WITH STERNUM. 



53 



-Surrounds the head of the rib ; thickest 

 Fig. 36. 



Posterior Coccygeal Ligament, arises from the inferior margin of 

 the sacral canal, and terminating at the second bone of the coccyx. 



Obturator Ligament^ (Fig. 35). — Fills up the thyroid foramen ; 

 is membranous and thin, perforated at its upper part for the trans- 

 mission of the obturator vessels. 



Sub-Pubic Ligament. — A thick, triangular ligament, rounding the 

 apex of the circle of the pubis ; reaching from one bone to the other. 



Symphysis Pubis. — The bones are connected by fibro-cartilage, 

 resembling intervertebral substance ; sometimes there is a synovial 

 membrane. A few transverse fibres in front and behind are some- 

 times called anterior and posterior ligaments. 



THORAX. 



VERTEBRAE WITH THE RIBS. 



Anterior or Radiated Ligament. — Short fibres radiating from 

 the head of the rib, to the two contiguous vertebroe and the sub- 

 stance between them. 



Capsular Ligament.- 

 above and below. 



Inter -articular Ligament. — A thin 

 band passing from the ridge on the head 

 of a rib to the intervertebral substance, 

 dividing the cavity into two parts, each 

 of which has a distinct synovial mem- 

 brane. The first, eleventh and twelfth 

 are exceptions to this rule. 



The tubercle of the rib is connected 

 to the transverse processes by a capsu- 

 lar ligament, and also the internal costo- 

 transverse ligament^ passes from the 

 inferior edge of the transverse process, 

 and is inserted in the sharp edge of the 

 neck of the rib below. 



External costo-transverse Ligament." 

 — Is quadrangular, extending between the transverse process and 

 the contiguous rib. 



Middle costo-transverse Ligament. — A collection of short irre- 

 gular fibres mixed with reddish adipose tissue, passing directly from 

 the transverse process to the rib. 



RIB WITH STERNUM. 



Anterior extremity of ribs. 



Anterior radiated Ligament^ (fig. 37). — Consists of a number of 

 fibres, reaching from the cartilage of the true ribs to the sternum, 

 and blending itself with the periosteum. 



Posterior radiated. Ligament. — Not so distinct as the last, passing 

 in the same direction. 



5* 



