Anatomy and physiology of the pelvic floor.

Lower urinary tract function consists of a complex interplay of neural input consisting of both involuntary and voluntary controls interacting with specialized anatomical structures. Damage to anatomical support structures may lead to derangements in urethral and bladder function. In addition, disorders related to physiological and neurological function of the lower urinary tract can result in abnormalities in the storage and evacuation of urine. The ultimate goal in the evaluation and management of women with pelvic floor dysfunction is to correlate functional derangements with anatomical changes. The understanding of various pelvic support defects in the pelvic visceral supports also allows the physician to perform the correct surgery needed for successful outcomes.