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Giggle incontinence, giggle enuresis or ''enuresis risoria'' is the involuntary release of urine in response to giggling or laughter. The bladder may empty completely or only partially.〔 Giggle incontinence is more common in children than adults, typically appearing at ages 5 to 7,〔 and is most common in girls near the onset of puberty.〔 The condition tends to improve with age, with fewer episodes during the teenage years,〔 but may persist into adulthood.〔 A survey of 99 student nurses indicated that about 25% had experienced such a wetting event during their lifetime, and about 10% were still susceptible in their late teens.〔 Giggle incontinence is a special form of urge incontinence,〔 and is not the same as stress incontinence, which is generally brought on by participating in vigorous sport.〔 ==Cause== In voluntary urination, the bladder's normally relaxed detrusor muscle contracts to squeeze urine from the bladder. One study, of 109 children diagnosed with giggle incontinence at Schneider Children's Hospital in New York, concluded that the cause of giggle incontinence is involuntary contraction of the detrusor muscle induced by laughter.〔 Because the complaint is difficult to reproduce under controlled conditions, its triggering mechanism is not clearly understood,〔 but may be related to cataplexy, a sudden transient episode of loss of muscle tone often triggered by strong emotions.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Giggle incontinence」の詳細全文を読む スポンサード リンク
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