8 THE POCKET ANATOMY 



(c) Articulation of the Sacrum and Coccyx. 

 Araphiarthrodial joint. 



The anterior sacro-coccygeal ligament, very indistinct, 

 passes from anterior surface of sacrum to that of the coccyx. 



The posterior sacro-coccygeal ligament passes from the 

 margin of the lower orifice of the sacral canal to the posterior 

 surface of the coccyx. 



Interarticular ligaments between the cornua. Lateral 

 ligaments, passing from the lower lateral angle of sacrum to 

 transverse process of ist piece of coccyx. 



A fibro-cartilage is placed between the sacrum and the 

 coccyx. 



(d) Symphysis Pubis. 



Amphiarthrodial joint bound together by the following 

 ligaments : 



The anterior pubic ligament consists of several layers of 

 fibres crossing the symphysis horizontally in front. 



The posterior pubic ligament resembles the anterior, but is 

 much less distinct, and connects the bones posteriorly. 



The superior pubic ligament connects the bones superiorly. 



The sub-pubic ligament, forming the upper boundary of 

 the pubic arch, is a thick triangular arch of fibres, attached 

 above to the fibro-cartilage, and laterally to the rami. 



The fibro-cartilage consists of two parts, one on each bone ; 

 the two are united in front, but posteriorly they are separated 

 by a small cavity lined by a synovial membrane. 



ARTICULATIONS OF THE UPPER EXTREMITY. 



I. STERNO-CLAVICULAR ARTICULATION. 



An arthrodial joint between the inner end of the clavicle 

 and the ist piece of sternum and ist costal cartilage, con- 

 nected together by the following ligaments : 



The anterior sterno-clavicular ligament is attached to upper 

 and anterior part of the inner end of the clavicle, and to the 

 upper and anterior part of the ist piece of the sternum. 



The posterior sterno-clavicular ligament passes between 

 the inner end of the clavicle and the sternum on the posterior 

 surface. 



The interclavicular ligament passes along the top of the 

 sternum from the inner end of one clavicle to the other. 



