Publication: Histochemical and ultrastructural features
Authors
Fekete, Eva ; Resch, B.A. ; Benedeczky, I.
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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 developing enteric nervous systern of the
hurnan foetus has been analyzed at the 10th and 18th
week of gestation with a special reference to the
development of nerve-rnuscle contacts. The rnyenteric
plexus forrnation was analyzed by rneans of electron
microscopy and on whole-mounts after NADH
diaphorase histochernistry. The developrnent of
noradrenergic innervation as an extrinsic inhibitory
supply was followed by means of a glyoxylic acidinduced
fluorescence rnethod. Differentiated neurons
and neuroblasts both occurred in rnyenteric ganglia of
the 10- and 18-week-old foetus although the ganglionic
neuropil was almost unidentifiable ultrastructurally at
the 10th week of gestation but was rnature looking at the
18th week. The nerve plexuses connecting the ganglia
frequently forrned distant and close rnyoneural contacts.
NADH-diaphorase histochernistry revealed that in the
18-week-old hurnan foetus rnost of the neural perikarya
was within the ganglia. Also, at the 18th week of
gestation a well-defined fluorescent network was
dernonstrated within the ganglia, as well as in the
internodal segrnents. On the basis of these observations
we concluded that the time between the 10th and 18th
week of gestation has pararnount irnportance for both the
rnorphological and functional rnaturation of the enteric
nervous systern.
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