THE CAUSE OF IRRITABLE BOWEL SYNDROME
Irritable bowel syndrome is the abnormal function (dysfunction) of the muscles of the organs of the gastrointestinal tract. The gastrointestinal tract, however, is complex. A system of nerves runs the entire length of the GI tract from the esophagus to the anus in the muscular walls. These nerves communicate with other nerves that travel to and from the spinal cord. Nerves within the spinal cord travel back and forth from the brain. (The gastrointestinal tract is exceeded in the numbers of nerves it contains only by the spinal cord and brain.) Thus, the abnormal function of the nervous system in IBS may occur in a gastrointestinal muscular organ, the spinal cord, or the brain.
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