MALE ACCESSORY REPRODUCTIVE ORGANS 259 



Akutsu 1 has shown that the vesiculse 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 2 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. 3 



According to Remy, 4 stimulation of a small ganglion situated 



FIG. 65. End-bulb in prostate. (After Timofeew, from Nagel.) 

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



on the inferior vena cava at the level of the renal veins in the 

 guinea-pig produced a sudden ejaculation. 



Loeb 5 states that he was able to induce contraction of the 

 vasa deferentia by stimulating the hypogastric nerves. 



Langley 6 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 7 

 observed that in the macaque monkey (Macacus rhesus), the 



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

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



2 Budge, loc. cit. 3 Langley and Anderson, loc. cit. 



4 Remy, " Nerfs ejaculateurs," Jour, de I'Anat. et de la Phys., vol. xxii., 

 886 



5 Loeb, loc. cit. 6 Langley, loc. cit. 

 7 Sherrington, loc. cit. 



