Licht- und elektronenmikroskopische Untersuchungen am Recessus praeopticus-Organ von Amphibien

Translated title of the contribution: Light and electron microscopic studies of the preoptic recess organ in amphibians

I. Vigh-Teichmann, P. Röhlich, B. Vígh

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The preoptic recess organ (PRO) of the 3rd brain ventricle of urodela and anura has been studied by light and electron microscopy. - The PRO consists of a special ependyma and a parvocellular group of neurons. The latter is built up of intraependymal, hypendymal and distal nerve cells. The neurons send processes into the preoptic recess where they form free, club-like nerve terminals. In the perikarya, their ventricular dendrites and liquor endings as well as in their peripheral axons a primary catecholamine, probably noradrenaline, can be demonstrated by fluorescence histochemistry. As demonstrated electron microscopically, the ventricular nerve endings contain mitochondria, a few ergastoplasmic cisternae, microtubuli and dense-core vesicles of various amounts and size (500-850 Å). It characterizes the neurons that they mostly possess a cilium; its basal body and accessory centriol give rise to long rootlet fibers. Cross sections of atypical cilia (type 8+1, 9+0, 10+1, 20+0) are described. The ventricular nerve processes are connected with the surrounding ependymal cells by zonulae adhaerentes. The perikarya of the intraependymal and hypendymal neurons contain various amounts of dense-core vesicles. The distal nerve cells and their processes contain relatively few catecholamine granules. In the neuropil, different types of synapses are to be observed probably acting in different manner. - On the basis of the morphological data, the question of a receptor function of the PRO is discussed.

Original languageGerman
Pages (from-to)217-232
Number of pages16
JournalZeitschrift für Zellforschung und Mikroskopische Anatomie
Volume98
Issue number2
DOIs
Publication statusPublished - Jun 1969

Fingerprint

Amphibians
Neurons
Electrons
Light
Cilia
Secretory Vesicles
Catecholamines
Ependyma
Basal Bodies
Urodela
Mitochondria
Third Ventricle
Neuropil
Nerve Endings
Accessories
Dendrites
Anura
Synapses
Electron microscopy
Optical microscopy

ASJC Scopus subject areas

  • Anatomy
  • Clinical Biochemistry
  • Cell Biology
  • Medicine(all)

Cite this

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title = "Licht- und elektronenmikroskopische Untersuchungen am Recessus praeopticus-Organ von Amphibien",
abstract = "The preoptic recess organ (PRO) of the 3rd brain ventricle of urodela and anura has been studied by light and electron microscopy. - The PRO consists of a special ependyma and a parvocellular group of neurons. The latter is built up of intraependymal, hypendymal and distal nerve cells. The neurons send processes into the preoptic recess where they form free, club-like nerve terminals. In the perikarya, their ventricular dendrites and liquor endings as well as in their peripheral axons a primary catecholamine, probably noradrenaline, can be demonstrated by fluorescence histochemistry. As demonstrated electron microscopically, the ventricular nerve endings contain mitochondria, a few ergastoplasmic cisternae, microtubuli and dense-core vesicles of various amounts and size (500-850 {\AA}). It characterizes the neurons that they mostly possess a cilium; its basal body and accessory centriol give rise to long rootlet fibers. Cross sections of atypical cilia (type 8+1, 9+0, 10+1, 20+0) are described. The ventricular nerve processes are connected with the surrounding ependymal cells by zonulae adhaerentes. The perikarya of the intraependymal and hypendymal neurons contain various amounts of dense-core vesicles. The distal nerve cells and their processes contain relatively few catecholamine granules. In the neuropil, different types of synapses are to be observed probably acting in different manner. - On the basis of the morphological data, the question of a receptor function of the PRO is discussed.",
author = "I. Vigh-Teichmann and P. R{\"o}hlich and B. V{\'i}gh",
year = "1969",
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N2 - The preoptic recess organ (PRO) of the 3rd brain ventricle of urodela and anura has been studied by light and electron microscopy. - The PRO consists of a special ependyma and a parvocellular group of neurons. The latter is built up of intraependymal, hypendymal and distal nerve cells. The neurons send processes into the preoptic recess where they form free, club-like nerve terminals. In the perikarya, their ventricular dendrites and liquor endings as well as in their peripheral axons a primary catecholamine, probably noradrenaline, can be demonstrated by fluorescence histochemistry. As demonstrated electron microscopically, the ventricular nerve endings contain mitochondria, a few ergastoplasmic cisternae, microtubuli and dense-core vesicles of various amounts and size (500-850 Å). It characterizes the neurons that they mostly possess a cilium; its basal body and accessory centriol give rise to long rootlet fibers. Cross sections of atypical cilia (type 8+1, 9+0, 10+1, 20+0) are described. The ventricular nerve processes are connected with the surrounding ependymal cells by zonulae adhaerentes. The perikarya of the intraependymal and hypendymal neurons contain various amounts of dense-core vesicles. The distal nerve cells and their processes contain relatively few catecholamine granules. In the neuropil, different types of synapses are to be observed probably acting in different manner. - On the basis of the morphological data, the question of a receptor function of the PRO is discussed.

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