Abstract
Constipation is common in Western countries, with an average prevalence of 15% in the general population. It negatively impacts quality of life and is one of the leading causes of medical consultation. Most patients with constipation respond to dietary alterations and fiber supplementation. Those who do not respond to these measures fall into a diagnostic category referred to as chronic idiopathic constipation, which encompasses evacuation disorders. Over one-third of patients with chronic constipation have an evacuation disorder, and of these, most have dyssynergic defecation. Dyssynergic defecation is also known as anismus, pelvic floor dyssynergia, obstructive defecation, paradoxical puborectalis contraction, pelvic outlet obstruction, or spastic pelvic floor syndrome.
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