Bruschini H, Schmidt R A, Tanagho E A
Invest Urol. 1978 Jan;15(4):284-7.
In an effort to locate and characerize a genital sphincter in the male posterior urethra, the intraluminal changes in urethral pressure under both sympathetic and parasympathetic stimulation were studied. It appears that 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.
为了定位和描述男性后尿道中的生殖括约肌，研究了交感神经和副交感神经刺激下尿道压力的腔内变化。似乎尿道有一个与前列腺尖上部分相对应的特定生殖括约肌长度。尿道长度似乎受交感神经控制，因此射精时不会发生精液逆流。尿道括约肌显然涉及整个后尿道，并且主要受副交感神经影响。
