MALE GENITOURINARY SPHINCTER MECHANISM IN DOG

1 January 1978

journal article
research article

Vol. 15 (4) , 284-287

Abstract

To locate and characterize a genital sphincter in the male posterior urethra, the intraluminal changes in urethral pressure under sympathetic and parasymapathetic stimulation were studied. The urethra has a specific genital sphincteric length corresponding to the supramontanal portion. The urethral length is seemingly under sympathetic control, so that backflow of semen does not occur during ejaculation. The urinary sphincter apparently involves the entire posterior urethra and is primarily under parasympathetic influence.

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