The physiology of human defecation - PubMed
Review
. 2012 Jun;57(6):1445-64.
doi: 10.1007/s10620-012-2071-1. Epub 2012 Feb 26.
Affiliations
- PMID: 22367113
- DOI: 10.1007/s10620-012-2071-1
Review
The physiology of human defecation
Somnath Palit et al. Dig Dis Sci. 2012 Jun.
Abstract
Human defecation involves integrated and coordinated sensorimotor functions, orchestrated by central, spinal, peripheral (somatic and visceral), and enteric neural activities, acting on a morphologically intact gastrointestinal tract (including the final common path, the pelvic floor, and anal sphincters). The multiple factors that ultimately result in defecation are best appreciated by describing four temporally and physiologically fairly distinct phases. This article details our current understanding of normal defecation, including recent advances, but importantly identifies those areas where knowledge or consensus is still lacking. Appreciation of normal physiology is central to directed treatment of constipation and also of fecal incontinence, which are prevalent in the general population and cause significant morbidity.
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