188 



THE NERVOUS SYSTEM. 



Fis;. 126. 



obliquely downwards and outwards over the transverse processes of 

 the sixth and seventh vertebrae and the corresponding- M. infer- 



transversarii, and at a 

 point nearly opposite 

 the middle of the uro- 

 style pierces the M. 

 ohii quits intermis. 



The rest of its coiirse 

 corresponds exactly 

 with that of the fourth 

 spinal nerve. 



6. The sixth spinal 

 nerve {N. spinalis JI) 

 (Fig. 126 M6), after 

 escaping from the ver- 

 tebral canal between 

 the sixth and seventh 

 vertebrae, runs ob- 

 liquely do^vnwards and 

 outwards on the under 

 surfaces of the trans- 

 verse processes of the 

 seventh, eighth, and 

 ninth vertebrae, then 

 under the iliac bone to 

 a point opposite the 

 hinder half of the uro- 

 style, where it descends 

 under cover of the M. 

 ohliqims abdom . in ieru us. 

 In the rest of its course 

 it repeats the corre- 

 sponding courses of the 

 fourth and fifth spinal 

 nerves. 



Ventral view of the brain and spinal cord, to show the 

 points of exit of the spinal nerves. 



7, 8, 9, and 10. The 

 seventh, eighth ninth, 

 and tenth spinal 

 nerves [Nerci spinales 

 Til, nil, IX, and N. spittalis X s. N. coccijgens) (Figs. 126 and 



ilf i-io Spinal nerves. 

 VG Trigeminal ganglion. 

 \V\-\o Vertebrae. 

 XG Ganglion of the vagus. 



