OF THE BACK. 



Occipital bone. 



435 



MULT1FIDUS SPIN 



First dorsal vertebra 



First lumbar vertebra. 



First sacral vertebra 



FIG. 288. Muscles of the back. Deep layers. 



If this muscle is reflected outward, it will be seen to be reinforced by a series of 

 muscular slips which arise from the angles of the ribs ; by means of these the Ilio- 



