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.
Reflex anal dilation - Wikipedia
Background: In this study we aim to present our experience in managing chronic anal fissures by manual anal dilatation in order to clarify whether this method is still viable in a modern surgical setup. Methods: A total of 55 patients who underwent manual anal dilatation for chronic anal fissures from March till March were studied prospectively. Mean duration of hospital stay was 1. At the end of 6 weeks post op, only 37 patients
Reflex anal dilation
You can search online to find them. You will need them at your follow-up clinic appointment after surgery to repair an imperforate anus. If you are traveling from out of town, pack them in your checked luggage since you may not be allowed to have them in carry-on luggage.
Reflex anal dilation RAD is the reflexive dilation of the human anus to a diameter greater than two centimeters in response to the parting of the buttocks or anal stimulation, such as brushing with a medical instrument. RAD was theorized to be a clinical marker associated with anal sexual assault in children,  and has been associated with other signs of sexual assault  but also appears in children with severe chronic constipation and those subject to invasive medical treatments of the anus. It was discredited during the trial as the sole indication of sexual abuse, determined to be considered a sign of sexual assault by a tiny minority of British doctors. From Wikipedia, the free encyclopedia. Forensic Sci.