Neurogenic Bowel

(Bowel, Neurogenic)

Definition

Neurogenic bowel occurs when the body has problems storing and removing stool from the intestines.
Intestines
Normal Anatomy of the Large and Small Intestine
Copyright © Nucleus Medical Media, Inc.

Causes

The digestion process is partly managed by messages sent between the brain and digestive system. These messages are sent through nerves. When these nerves are damaged, messages between the brain and digestive system are blocked. This prevents the bowels from working properly.The spinal cord runs from the base of the brain to the lower back. There are 2 main types of neurogenic bowel, depending on where along the spinal cord the damage occurs.

Reflexic Bowel

This happens when there is damage around the neck or chest. Messages between the colon and the brain are interrupted. As a result, a person may not feel the need to have a bowel movement. However, stool is still building up in the rectum. The build-up triggers a reflex causing the rectum and colon to react, leading to a bowel movement without warning.

Areflexic Bowel

This happens when there is damage around the lower end of the spinal cord. When these lower nerves are damaged, a person is unable to feel when a bowel movement is needed. Also, the reflex may be reduced, so the rectum has a difficult time emptying stool. This can lead to constipation.

Risk Factors

Spinal cord injury is the main risk factor.

Symptoms

Symptoms of neurogenic bowel may include:
  • Trouble having a bowel movement
  • Repeated bowel accidents
  • Swollen abdomen
  • Feeling full (not hungry) quickly
  • Loose stools or very hard stools
  • Bleeding from the rectum
  • Abdominal pain

Diagnosis

You will be asked about your symptoms and medical history. A physical exam will be done. A rectal exam may also be done.Your waste products may be tested. This can be done with stool tests.

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