In a nutshell
The stomach is not a rigid container: during a meal, its upper section can relax and expand. This initially limits the rise in internal pressure despite increasing contents.
Why does it happen?
Signals during eating activate, among other things, a reflex involving the stomach, vagus nerve, and brainstem. Returning signals control inhibitory nerve cells in the stomach wall. Messengers such as nitric oxide relax smooth muscle and allow the meal to be accommodated.
Frequency
The stomach’s adjustment to a meal is part of normal digestive function. The extent of relaxation and stretching is not equivalent to a population rate.
Frequency is a qualitative description, not your individual probability.
Is it normal?
This adjustment normally occurs unnoticed.
When to seek advice
New persistent early fullness, vomiting, weight loss, or upper-abdominal pain should be assessed.
Does this happen to you?
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Sources (1)
- Rolle von Stickstoffmonoxid bei der Magenakkommodation und der nahrungsbedingten Sättigung (opens a new tab)
The human study examines the role of nitric oxide in reflexive relaxation of the stomach.
Editorial update: . AI-assisted research and editing; not individually reviewed by a physician. How we research
