Chap. 12,3 151 3 



CHAP. XII. 

 MUSCLES OF THE TRUNK. 



Mufcles of the Nick and Back. Of the Brea.ji.~- Of the Ribs. The 

 Diaphragm, Mufcles of the Abdomen. Of the Pelvis, tfr. 



ON the anterior part of the neck, clofe to the ver- 

 tebra, are feated the following mufcles : 



The longus colli arifes from the bodies of three o/ 

 the vertebras of the back, and from the tranfverfe 

 proceffes of moft of the vertebrae of the neck. It is 

 inferted into the fore part of all the vertebras of the 

 neck, and has the effect of drawing it forwards or to 

 one fide, according as the mufcle on both fides, or 

 that on one only, is called into action. 



The rectus capitis internus major proceeds from 

 the extremity of the tranfverfe procefies of the third, 

 fourth, fifth, and fixth vertebras of the neck, is inferted 

 into the cuneiform procefs of the os occipitis, and 

 bends the head forwards. 



The rectus capitis internus minor arifes from the 

 fore part of the body of the firft vertebra of the neck, 

 is inferted into the condyloid procefs of the os occi- 

 pitis, and alfo bends the head forwards. 



The rectus capitis lateralis arifes from the anterior 

 part of the point of the tranfverfe procefs of the firft 

 vertebra of the neck, and is inferted into the os occi- 

 pitis, and bends the head a little to one fide. 



The large arid ftrong mufcles, feated at the pofte- 

 rior part of the trunk, may be divided into four layers 

 and a fingle pair. The external layer confifts of two 

 very broad mufcles, 



L4 The 



