<unk> s <unk> , also known as<unk> s of gut–brain interaction, include a number of separate idiopathic<unk> s which affect different parts of the<unk>  tract and involve visceral hypersensitivity and motility disturbances.
Functional gastrointestinal disorder
Functional constipation
Neurogenic bowel dysfunction
Purging disorder
Irritable bowel syndrome
Obstructed defecation
Factitious diarrhea
Fecal impaction