Electrical stimulation of the rectal ampulla causing reflex voiding.

Electrical stimulation of the rectal ampulla resulted in a desire to void and defecate in 11 patients with an intact nervous system. There was a contraction of the detrusor and the rectal ampulla with relaxation of the anal sphincter. Electrical stimulation of the rectal ampulla and anal sphincter has clinical applications in patients with incontinence of, or inability to empty, the lower urinary tract or fecal system.