[Disorders of anorectal function].

Since sophisticated function tests of the anorectal continence organ become more and more available, dysfunction of the anorectum is increasingly diagnosed and differentiated. The examination includes measurements of the pressure in the rectum and anal canal (anorectal manometry), rectal distension by an inflatable balloon to test the sensibility, electromyography and radiological defecography. By these methods the etiology and pathogenesis of the most important anorectal disorders, such as anal incontinence, different forms of constipation and rectal prolapse, may be differentiated. Nowadays, many of these disorders are successfully treated by a specific management which includes a special diet, drugs, surgery and biofeedback training programs.