Provides comprehensive coverage of the male and female sphincteric mechanisms and their connection to the pelvic floor as well as upper and lower urinary tract function--emphasizing modern approaches to the epidemiology, diagnosis, and treatment of abnormalities, including incontinence, hypertonicity, retention, dyssynergia, and the overactive sphincter. Highlights state-of-the-art clinical, urodynamic, electrophysiological, and imaging techniques such as ultrasonographic explorations of the femal urethra.