THE ACCESSORY REPRODUCTIVE ORGANS 269 



lie found hypogastric stimulation to produce contraction of the 

 prostatic muscles. 1 



Akutsu z has shown that the vesicular seminales in the guinea-pig 

 receive fibres (motor as well as secretory) by the hypogastric nerves. 

 The fibres leave the spinal cord in the 2nd, 3rd, and 4th lumbar 

 nerves. 



Budge 3 showed that it was possible to induce contraction of the 

 vasa deferentia by stimulating the spinal cord at the level of the 

 4th lumbar vertebra. He observed also that contraction could be 

 caused by stimulating one of the sympathetic ganglia, apparently 

 the inferior mesenteric. 4 



According to Remy, 5 stimulation of a small ganglion situated on 

 the inferior vena cava at the level of the renal veins in the guinea- 

 pig produced a sudden ejaculation. 



FIG. 74. End-bulb in prostate. (After Timofeew, from Nagel.) 

 a, Thick medullated nerve fibre ; b, fine medullated nerve fibre. 



Loeb G states that he was able to induce contraction of the vasa 

 deferentia by stimulating the hypogastric nerves. 



Langley 7 found that most of the efferent fibres for the vasa 

 deferentia traversed the sympathetic in the region of the 4th, 5th, 

 and 6th lumbar ganglia, so that presumably they chiefly arose from 

 the 3rd, 4th, and 5th lumbar nerves. Sherrington 8 observed that 

 in the macaque monkey (Macacus rhesus) the 2nd and 3rd lumbar 

 nerves, and in the cat the 3rd and 4th lumbars, contained motor 

 fibres for the vasa deferentia. The fibres giving this result could 



1 Fogge, "On the Innervation of the Urinary Passage in the Dog," Jour, 

 of Physiol., vol. xxviii., 1902. 



2 Akutsu, " Beitrage zur Kenntniss der Innervation der Samenblase beim 

 Meerschweinchen," Pfliiger's Archiv, vol. xcvi., 1903. 



3 Budge, loc. tit. 



4 Langley and Anderson, loc. tit. 



6 Remy, "Nerfs ejaculateurs," Jour, de VAnat. et de la Phys., vol. xxii., 1886. 

 6 Loeb, loc. tit. 

 1 Langley, loc. tit. 

 8 Sherrington, loc. tit. 



