Cause of irritable bowel syndrome

Because discussed previously, irritable bowel syndrome lives trusted to be due to  the abnormal function (dysfunction) from the muscles by the organs of the  gastrointestinaltract or the nerves controlling the organs. The nervous control  of the gastrointestinal tract, however, is complex. A system of nerves runs the  entire length of the gastrointestinal tract from the esophagus to the anus in  the muscular walls of the organs. These nerves communicate with other nerves  that travel to and from the spinal cord. Nerves within the spinal cord, in turn,  travel to and 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.

The nervous system that  controls the gastrointestinal organs, as with most other organs, contains both  sensory and motor nerves. The sensory nerves continuously sense what is  happening within the organ and relay this information to nerves in the organ’s  wall. From there, information can be relayed to the spinal cord and brain. The  information is received and processed in the organ’s wall, the spinal cord, or  the brain. Then, based on this sensory input and the way the input is processed,  commands (responses) are sent to the organ over the motor nerves. Two of the  most common motor responses in the intestine are contraction or relaxation of  the muscle of the organ and secretion of fluid and/or mucus into the organ.

As already mentioned, abnormal function of the nerves of the  gastrointestinal organs, at least theoretically, might occur in the organ,  spinal cord, or brain. Moreover, the abnormalities might occur in the sensory  nerves, the motor nerves, or at processing centers in the intestine, spinal  cord, or brain. Some researchers argue that the cause of functional diseases is  abnormalities in the function of the sensory nerves. For example, normal  activities, such as stretching of the small intestine by food, may give rise to  abnormal sensory signals that are sent to the spinal cord and brain, where they  are perceived as pain. Read the rest of this entry