... male. We made the following findings: (1) The detrusor system does not take part in the formation of the urethral muscular system, it only forms a loop around the proximal part of the urethra. (2) The trigonal system forms a true sphincter in both males and females. In males it is more proximal than...

...Hubert John; Dieter Hauri; Urs Bangerter; Ahmad Elbadawi Objective: To investigate the ultrastructure of the trigonal muscle (= superficial trigone), relate it to normal function, and identify any changes it may undergo in voiding dysfunction. Materials and Methods: 20 men (median age 67 years...