Publication: Ultrastructural characteristics of anterior gut innervation of Gallus gallus
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Date
1990
Authors
Aisa, J. ; Parra, P. ; Azanza, M.J.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
The enteric nervous system of the bird's
anterior gut is very well developed. Myelin fibres are
seen accompanying the nervous trunks up to the mucous
layer. Glial cells duplicate the number of neurons in the
myenteric plexuses. Their number decreases at the submucous
plexuses, but it is always higher than the
neurons. Isolated neurons are widely spread in the
circular muscle coat accompanying the nervous trunks
which can be inter and intrafascicularly located. Direct
synaptic contacts with the soma neurona1 membranes are
very often seen. We have never observed synaptic
specializations. The most prominent varicosities either in
the peripheric nervous trunk axons or directly laying on
the soma membranes are those containing peptidergic or
mixed vesicles of cholinergic and peptidergic types. The
neurons show big nuclei of different size and shape.
Neighbouring smooth muscle cells show abundant
caveolae near the nervous elements. Although we have
not observed close contacts with glands, thin axon
bundles spread near the glandular cells of the mucous
layer .
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