Chap. 12.] Neck, Back, fcfr. 155 



Semifpinalis dorfi, which arifes from the tranTverfe 

 procefTes of the feventh, eighth, ninth, and tenth ver- 

 tebrae of the back, is inferted into the fpinous procefies 

 of all the vertebras of the back above the eighth, and 

 into the two lowermoft of the neck. Its effect: i*to 

 extend the fpine backwards. 



The multifidus fpinas originates from the fide and 

 fpinous proceftes of the os facrum,and from the pofte- 

 riorpartoftheos ileum, where it joins thefacrum; from 

 all the oblique and tranfverfe procefles of the vertebras 

 of the loins j from all the tranfverfe procefles of the 

 vertebras of the back, and from thofe of the neck, ex- 

 cept the three upper j its tendinous and mufcular fibres 

 run in an oblique direction, and are inferted into the 

 fpinous procefies of all the vertebras of the loins, of 

 the back, and of the neck, except the firft. When one 

 fide of this mufcle ads by itfelf it extends the fpine 

 obliquely, when both act they draw it directly back- 

 wards. 



On the poflerior part of the neck are the femifpina^ 

 lis colli, which arifes from the tranfverfe procefles of 

 the fix uppermoft vertebras of the back, and is inferted 

 into the fpinous procefles of all the vertebras of the 

 neck. It extends the neck backwards. 



The tranfverfalis colli, which proceeds from the 

 tranfverfe procefles of the five uppermoft vertebra 

 of the back, and is inferted into the tranfverfe pro- 

 cefles of all the cervical vertebras, except the firft and 

 the laft. It turns the neck obliquely backwards and a 

 little to one fide. 



Below the pofterior part of the occiput are, 



The rectus capitis pofticus major. This mufcle 

 arifes from the external part of the fpinous procefs 

 of the fecond vertebra of the neck, afcends ob- 

 liquely outwards^ and is inferted into the os occipkis. 



It 



