Impetus to transferring non-motile sperm in the seminiferous tubules into the epididymis.

Effect of intratesticular pressure was examined on non-motile sperms in the testis whether they move toward the epididymis when it is raised. The head portion of the epididymis of the dog was cut apart at the proximal portion to the testis fully exposing the lumen of the epididymis. The electric stimulation of perivascular nerves of the spermatic cord caused spermatozoa to flow out onto the incision site at 5 min. The number of them increased progressively, almost innumerable at 15 min. These results support the view that the elevated intratesticular pressure by electric stimulation surely works to transfer non-motile sperm in the seminiferous tubules into the epididymis.