Constipation caused by dyssynergic defecation is common and affects up to one half of
patients with this disorder. It is possible to diagnose this problem through history,
prospective stool diaries, and anorectal physiologic tests. Randomized controlled trials have
now established that biofeedback therapy is not only efficacious but superior to other
modalities and that the symptom improvement is caused by a change in underlying
pathophysiology. Development of user-friendly approaches to biofeedback therapy and use …