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Innervation of the cat ureter. An experimental study
Acta Morphologica Academiae Scientiarum Hungaricae
|January 1, 1981
Summary
This study investigated ureter innervation using microscopy. Most nerve fibers originate from hypogastric ganglia and directly influence smooth muscle cells.
Area of Science:
- Urology
- Neuroscience
- Histology
Background:
- The innervation of the ureter is crucial for its function.
- Understanding the origin and type of nerve fibers is essential for diagnosing and treating ureteral disorders.
Purpose of the Study:
- To investigate the innervation of the ureter.
- To characterize the different types of nerve processes and their origins.
- To determine the direct impact of these nerve processes on ureteral smooth muscle cells.
Main Methods:
- Fluorescent microscopy using glyoxylic methods.
- Electron microscopy.
- Extirpation of hypogastric ganglia in animal models.
Main Results:
- Four distinct types of nerve processes (a, b, c, d) were identified based on vesicle morphology.
- Following hypogastric ganglia extirpation, nerve terminals degenerated throughout the ureter.
- A few fluorescent fibers remained in the muscle layers, suggesting alternative origins.
Conclusions:
- The majority of ureteral fluorescent fibers originate from the hypogastric ganglia.
- Some nerve fibers may originate from local neurons or spinal ganglia.
- These nerve processes directly innervate ureteral smooth muscle cells, influencing ureteral function.