Variations with function and anatomical site comparison with females

Abstract

The well-developed female PB, instead,intertwined with the deep perineal muscle and both structures passed the vagina bilaterally to form theperineal membrane in the posterior portion of the urogenital triangle. The urethral rhabdosphincter extendedin the anterior portion of the urogenital triangle between the penile bulb inferiorly and the bladder necksuperiorly, and consisted of a well-developed circular ‘membranous’ portion with bilateral posteroinferior‘wings’ and a thinner ‘prostatic’ portion on the prostate anterior side. In men, muscles occupy the urogenitaltriangle, but additional tightening of the locally fibrous adipose tissue by the superficial transverse perinealmuscle appears necessary to generate functional support in women. An interactive 3D pdf file with theseanatomical details (available online) should allow more accurate interpretation of ultrasound, computedtomography and magnetic resonance images