Submucosal Plexus


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Submucosal Plexus

 

Meissner’s plexus (after the German scientist G. Meissner, 1829–1905), in vertebrates and man, the aggregation of bundles of neural fibers and clusters of nerve cells in the submucosa of the organs of the digestive tract.

The neural ganglia of the submucosal plexus are made up of poorly differentiated cells, whose number decreases with age, and two types of polydendritic neurons. The poorly differentiated cells divide and replace dead neurons. The first type of polydendritic neurons are motor cells that receive stimuli from the central nervous system through the vagus nerve and its parasympathetic sacral branches or from neurons of the second type. The second type are sensory cells outside the central nervous system that transmit stimuli to the smooth muscles or the glands of the organs that regulate the motor and secretory functions of the digestive tract.

References in periodicals archive ?
Morphometric aspects of the submucosal plexus in whole-mount preparations of normal human distal colon.
In small rodents, the submucosal plexus is unique, probably due to the thickness of the submucosal tela (Gunn; Furness & Costa; Brehmer et at., 2010).
However, the submucosal plexus lacks descriptive studies because it has been less explored concerning its morphofunctional and pathological aspects.
After microdissection, Whole mounts preparations with the submucosal plexus of each animal were obtained and submitted to the Giemsa (Barbosa, 1978), NADH-diaphorase (NADH-d) (Gabella, 1969) and NADPH-diaphorase (NADPH-d) (Scherer-Singler et at., 1983) histochemical techniques to stain the total neuronal population, more metabolically active subpopulation and subpopulation of nitrergic neurons, respectively.
The submucosal plexus is a continuous structure along the intestinal circumference, organized in a single plan.
In this experiment, the submucosal plexus was observed as a continuous structure along the intestinal circumference, organized in a single plan.