Mil \i l"\o.\ll< VERVO II. M 



-1 



stellatum for the fore limb, and 'Ii«' lower lumbar :in<l upper 

 ganglia for the hind limb. When they are stimulated, the muscular 

 fibers surrounding the Bweal glands contracl and Bqueeze out ,: 



si ri Ail' >N OF BLOOD 



VESSELS LB 



1 and neck. - perior cervical ganglion. 





Anterior extremity. 



tellatum and in- 

 cervical ganglion. 



Ganglion stellatum. 



terior extremity. 6th lumbar, 7ih lumbar, and 

 Isl Bacral ganglion. 



Kidney. R i lion. 



Spli 



Semilunar ganglion. 



Abdominal viscera. Superior mesenteric ganglion 



and semilunar ganglion. 



I'. Ivic viscera. Inferior mesenteric ganglion. 



1. 2, ■"•. t. 5, •'■ 

 rimum effect. 



1. 2, ."•. I. 5 

 maximum. 



I. 5, 6, 7. B, '.'. • 

 Blightly. 



II. 12, 13, • 

 and 3 slightly. 



I. 5, 6, 7. - 11. 12, 



thoracic : I, 2, 3, 1. luml 



::. I. 5, 6, 7. B, 9, 1". n. 12, 13, 

 thoracic ; I, 2, 3, lun 



6, 7. 8, 9, 1". 11, 13, '!. 1. 2, 



3, lumbar. 



1. 2, •"■. 1. lumbar. 



ikell) 



The ganglia for the pilomotor fibers are more widespread (extending 

 from the fourth thoracic to the coccygeal ganglia); hut the eonnec 

 fibers are again Btrictly confined to the thoracicolumbar region. Stimu- 

 lation i>t' these fibers causes movement of the hairs, or <>n hairless animals, 

 the condition called " goose Bsdn." 



The Motor Nerves of tin Muscles Surrounding t) v \a\ Duct. — 



h will 1 bserved thai the connector fibers to the abdominal and - 



vie viscera are collected into two Bpecial nerve trunks, the great* 



the lesser or Lumbar) Bplanchnics. The collateral ganglia semilunar 



and Buperior and inferior mesenteries with which thes nnect, I 



ning to <i" with the segmental nerves, but their nei send fil 



(postganglionic) which Bupply the various viscer only "v\ i t li vi 



motor fibers but also with the "s; mpathetic" fibers, which we hav< 

 exercise Buch an importanl control over their glandular a n«l muscular 

 functions. 



AM of the fibers contained in the lumbar Bplanchnics <1" n 

 have their cell stations in the inferior mesenti 

 through it :ni«l proceed in the hypogastric 

 cells mi the musculature of the vari< 

 from the Miillcrian and Wolffian ducts 



