Changes of ejaculation due to suppression of noradrenaline biosynthesis by diethyldithiocarbamate in dogs: a supplemental report with reference to changes of posterior urethral pressure.

In the preceding paper (Kimura et al.-1979) it was reported that diethyldithiocarbamate suppresses ejaculation, although penile erection is maintained, and that the suppression is not mediated by the central nervous system but by the decrease of catecholamine contents in the organs relating to sperm transport. In this paper, changes of ejaculation following administration of diethyldithiocarbamate was studied with the posterior urethrogram; measurement of the posterior urethral pressure during hypogastric nerve stimulation. From the results obtained in this study the above results were confirmed. It was also confirmed that both seminal emission and ejaculation are under the influence of an alpha-adrenergic receptor mechanism. Also, a dopamine receptor mechanism was suspected to be present in the male accessory sexual glands.