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How Does Healthy Pooping Work #2 The Urge
Feeling The Urge To Poop
The urge for a bowel movement is stimulated by a combination of physiological and neurological factors. This is a simple overview for our purposes of understanding all the things that can go wrong.
- Filling of the Rectum: As waste accumulates in the large intestine (colon) and reaches the rectum, it expands the rectal walls, triggering a sensation of fullness or pressure.
- Stretch Receptors: Specialized nerve endings in the rectal walls, known as stretch receptors, detect the expansion caused by the accumulating feces. This triggers signals to the brain indicating the need to empty.
- Neurological Response: The sensory signals from the rectum travel to the spinal cord and then to the brain stem, where they are processed. The brain stem then sends signals back to the rectum, initiating the involuntary muscle contractions necessary for defecation.
- Voluntary Control: Although the initial urge to defecate is largely involuntary, once the urge is felt, there is a voluntary component involved in deciding when and where to evacuate the bowels. This voluntary control is mediated by the external anal sphincter muscles. We might need to re-sensitize our awareness after years of "holding it".
If any step is blocked, damaged, disrupted, or otherwise not firing, constipation may result.
We are going to work on each of these areas through the daily practices.
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How Does Healthy Pooping Work #2 The Urge
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