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Its a set of 2 anatomical entities: pelvic and urogenital diaphragms. The most important components of the pelvic floor is the elevator anus muscle which is formed by the pubococcygeal and iliococcygeal muscles, giving support to the pelvic organs and helping the action of the sphincter of the urethra, vagina and rectum9 . This muscles is composed of muscular fibres type I, of slow contraction (70%) and by muscular fibres type II of quick contraction (30%). Due to this composition the anus elevator muscles is capable of maintaining muscular tonus for a prolongued period of time and also of contracting suddenly in situations resulting from increase of the intraabdominal pressure such as coughing and sneezing9.


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