ill 



§ 108. Beginning their upper attachments on 

 each side, behind and parallel with the lower at- 

 tachments of the pillars of the diaphragm, that is 

 to say, on the upper C of the third S, are two long 

 and thick muscles called the '' Fsooe.'' They de- 

 verge from each other obliquely, outward and 

 downward, until, passing from the inside of the 

 pelvis, they reach the thigh bones, to each of which 

 a psoas muscle is so fixed that by its contraction 

 the thigh bone is rolled outward. Thepsooe muscles, 

 -as we should suppose, turn with the effect of the pri- 

 mary sections of the anterior tvinding lines on the upper 

 G C, and, with the "pillars," complete the analogy 

 of the diaphragm to the ' digastrics," two small but 

 focal muscles to be presently mentioned. 



§ 109. The various muscles above referred to 

 mark out, we think, the leading lines by, and on 

 which the curvatures of compression and extension 

 are formed. They are assisted by a multitude of 

 other muscles, some larger, some smaller, which all 

 work in harmony with them, if the frame be undis- 

 torted. 



§ 110. As centres of formation for the new curves. 



either may, by interfering with the working of the diaphragm, induce 

 •distortion. Such trouble with the stomach would, by enlarging and 

 fixing the course of the secondary section of the left anterior winding- 

 line, favoiir the right-handed deformity. 



