Anal dilatation in response to gentle parting of the buttocks has been advocated as a sign of sexual abuse in children, but nothing is known of the physiology of this response or its existence in normal subjects, in patients with spinal disease, and in patients with a weak sphincter and whether it can be elicited after training. To answer these questions we investigated the effect of parting the buttocks on anal function. Combined anal manometry and electromyography was conducted in six normal subjects five men, one woman, aged years , in 18 patients with faecal incontinence three men, 15 women, aged years , and in seven paraplegic patients six men, one woman, aged years , in four of whom the posterior sacral roots had been cut. Parting the buttocks in normal subjects reduced the pressure in the anal canal from 20 to 14 3 cm H2O mean SEM , p less than 0. This drop in pressure was associated with increased electrical activity in the external anal sphincter.
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Leukoplakia of the anal verge with bleeding hemorrhoids: a case report
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Transperineal sonographic anal sphincter complex evaluation in chronic anal fissures. The purpose of this study was to assess the role of transperineal sonography in assessment of pathologic changes to the anal sphincter complex in patients with chronic anal fissures. We conducted a prospective case-control study of consecutive patients of any age and both sexes with chronic anal fissures who presented to a colorectal clinic between January and August group A and 50 healthy volunteers group B.
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