NERVE SUPPLY OF THE BLADDER. 



343 



(in the cat). They are connected, as Langley and Anderson 1 have 

 shown by means of the nicotin method, with cells in the inferior mes- 

 enteric ganglion, and make no connection with the cells in the ganglia 

 of the lumbar sympathetic chain. In the monkey, according to Sher- 

 rington, 2 these nerves are derived from the second, third, and fourth 

 lumbar in most cases, rarely from the third, fourth, and fifth. 



Second lumbar ganglion. 

 Solar ganglia. 



Third lumbar ganglion. 



Left renal artery and 



nerves. 



Fourth lumbar ganglion. 



Aorta. 



Fifth lumbar ganglion. 

 Left spermatic ganglion. 

 Genito-crural nerve. 

 Left spermatic artery. 



Inferior mesenteric gang- 

 lia. 



Sixth lumbar ganglion. 



Vas deferens. 

 Hypogastric nerves. 



Crural nerves. 



Seventh lumbar ganglion. 



First sacral ganglia. 



Obturator nerve. 

 Sciatic nerve. 



Pelvic nerve. 



Fir. 188a. — Diagram of the nerve supply to the bladder and colon in the cat (Langley and 

 Anderson, Joum. Physiol., Cambridge and London, 1896, vol. xx. p. 372. 



With regard to the functions of these two sets of nerves, almost all 

 observers agree that they convey motor impulses to the bladder. On 

 exciting the lumbar nerve-roots or the mesenteric branches to the 

 ganglion, a weak bilateral contraction of the bladder is obtained — a 



1 Joum. Physiol, Cambridge and London, 189.5, vol. xix. p. 71 ; 1896, vol. xix. p. 372 ; 

 1896, vol. xx. p. 372. 



2 Ibid., 1892, vol. xiii. p. 678. 



