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Cholinergic innervation of the human stomach
Morphologie Et Embryologie
|January 1, 1975
Summary
This study mapped the parasympathetic nervous system in the human stomach using acetylcholinesterase activity. Cholinergic nerve fibers are abundant throughout all four gastric layers, particularly in the muscularis externa and submucosa.
Area of Science:
- Gastroenterology
- Neuroscience
- Histochemistry
Background:
- The parasympathetic nervous system regulates gastric function.
- Understanding the distribution of cholinergic nerves in the stomach is crucial for comprehending gastric physiology and pathophysiology.
Purpose of the Study:
- To investigate the distribution and density of parasympathetic (cholinergic) nerve fibers within the four layers of the human stomach.
- To identify specific locations of cholinergic innervation in the gastric mucosa, submucosa, muscularis externa, and subserosa.
Main Methods:
- A histochemical method utilizing acetylcholinesterase (AChE) activity staining.
- Microscopic examination of stained gastric tissue sections to visualize nerve fibers and ganglia.
Main Results:
- All four gastric layers exhibit rich cholinergic innervation.
- Nerve fibers are concentrated around gastric glands and within the muscularis mucosae in the mucosa.
- The submucosa contains interconnected nerve fibers and scarce ganglia cells with strong AChE activity.
- The muscular layer shows the highest density of cholinergic nerve fibers, including Auerbach's plexus.
- The subserous layer is also rich in interconnected cholinergic nerve fibers.
- Gastric vessels throughout all layers display cholinergic innervation.
Conclusions:
- The human stomach possesses a dense and widespread cholinergic nerve network distributed across all its layers.
- This extensive innervation suggests a significant role for the parasympathetic nervous system in regulating various gastric functions, including secretion, motility, and vascular tone.