STUDIES ON EJACULATION

Report 2. Posterior Urethrogram as a Method to Study Ejaculation

Abstract

Erection and ejaculation were caused in male mongrel dogs by manual stimulation to the penis using a procedure of masturbation. The pressure alterations in the posterior urethra was recorded from the onset of the stimulation to the end of ejaculation. As a result, it was noted that the time course of the pressure change in the present experiment was the same as the posterior urethrogram in the former report, and that rhythmic alterations in the posterior urethrogram were identical with the pressure change in the posterior urethra during real ejaculation.