The cytology of the neurones of limnaea stagnalis

Moussa, Tohamy A.

doi:10.1002/jmor.1050870103

Cited by 27 publications

(6 citation statements)

References 9 publications

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“…The filaments in the neurons of Patella are similar to the filaments, rods, batonets, dictyosomes, etc. seen in neurons of other gastropod animals and identified by various workers as true Golgi elements (36,19,21,6,28,5,29).…”

Section: It Is Evident From the Present Work That The Golgi Apparatusmentioning

confidence: 92%

“…Text-figs. 1 b and 1 d are based on the work of Brambell and Gatenby (6), Monn4 (28), Boyle (5), and Moussa (29). Text- fig.…”

Section: Text-fig 1 Golgi Apparatus In Neurons Of Different Genera mentioning

confidence: 99%

“…4. The Golgi apparatus is present in the form of short curved rods (batonets) with attached archoplasm (6) or sometimes without archoplasm (28,5,29). 5.…”

mentioning

confidence: 99%

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The Golgi Apparatus in Neurons and Epithelial Cells of the Common Limpet Patella Vulgata

Lacy

1957

The Journal of Cell Biology

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1. In view of widely diverse views held about the identity and structure of the Golgi apparatus in neurons of Mollusca, particularly gastropods, a study has been made on neurons of the common limpet, Patella vulgata, both by light and electron microscopy. A report is given also of observations made on epithelial cells of Patella by electron microscopy. 2. As revealed by Kolatchev's method, the Golgi apparatus in neurons consists basically of black filaments lying to one side of the nucleus. The filaments generally anastomose to form networks of various complexity. Rarely some cells contain only discrete filaments. Associated with some of the filaments is a weakly osmiophilic substance identified as archoplasm. Kolatchev's method also revealed spheroidal bodies (neutral red bodies, "lipochondria," etc.). 3. It has not been possible to demonstrate the Golgi apparatus using either iron-haematoxylin or Sudan black. 4. Examination of Kolatchev's preparations by electron microscopy has revealed that some of the Golgi filaments consist of chromophilic and chromophobic components. The chromophilic component consists of dense lamellae. 5. After fixation in buffered osmium tetroxide solution and examination by electron microscopy, it has been concluded that (a) the chromophilic component of the Golgi apparatus corresponds to a system of paired membranes (which usually enclose an inner dense substance), (b) the chromophobic component corresponds to a substance lying within small dilations of the paired membrane, and (c) the archoplasm corresponds to numerous small vesicles. 6. The paired membranes branch, anastomose, and can often be traced back to a common source. They are interpreted as lamelliform folds, and occasionally tubular processes, of essentially a single Golgi membrane. In cells containing a Golgi network it is suggested that the membrane extends through the whole of the apparatus in such a way that the substance it encloses may be regarded as being in a continuous phase. 7. Epithelial cells of Patella contain a juxtanuclear Golgi apparatus with an ultrastructure similar to that described for neurons.

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Section: It Is Evident From the Present Work That The Golgi Apparatusmentioning

confidence: 92%

“…Text-figs. 1 b and 1 d are based on the work of Brambell and Gatenby (6), Monn4 (28), Boyle (5), and Moussa (29). Text- fig.…”

Section: Text-fig 1 Golgi Apparatus In Neurons Of Different Genera mentioning

confidence: 99%

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The Golgi Apparatus in Neurons and Epithelial Cells of the Common Limpet Patella Vulgata

Lacy

1957

The Journal of Cell Biology

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“…Here they ramify frequently, giving rise to hundreds of axonal branches, as established in the present study by examining serial sections at the electron microscope level. For the general cytology of the nerve cells in L. stagnalis reference is made to light microscope studies of Moussa (1950) and Boer (1965). The latter obtained evidence that the volumes of the cell bodies might be correlated with the degree of polyploidy of the cells.…”

Section: Morphology Of the Central Nervous Systemmentioning

confidence: 99%

“…The glial processes penetrating into the neuronal cell bodies are referred to in the literature as Holmgren's canals (c/., Moussa, 1950) or as trophospongium (c/., Sakharov et al, 1965;Coggeshall, 1967). Although the trophospongium seems to be weakly developed in L. stagnalis, its ultrastructure is rather similar to that of gastropods like Archachatina margínala.…”

Section: Morphology Of the Central Nervous Systemmentioning

confidence: 99%

Ultrastructure and histochemistry of neurosecretory cells and neurohaemal areas in the pond snail Lymnaea stagnalis (L.)

Bonga

1970

Z. Zellforsch.

226

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Sum man/. In t he central ganglia of Lymnaea stagnalis neurosecretory cell groups have previously been identified by means of chrome-haematoxylin or paraldehyde-fuchsin stains. In the present study seven types have been distinguished within the class of Gomori-positive cells on the basis of different staining reactions with the alcian blue/alcian yellow technique. Five types are located in the cerebral ganglia and in the lateral lobes, whereas two cell types occur in the ganglia of the visceral ring. No neurosecretory cells have been observed in tlie buccal and pedal ganglia.The staining technique used proved to be superior to the classic neurosecretory stains, because with this method the secretory substances can easily be distinguished from non-secretory Gomori-positive tissue constituents. One of the two Gomori-negative neurosecretory cell types of the cerebral ganglia react positively with the alcian blue/alcian yellow technique. In addition, two Gomori-negative neurosecretory cell types, which had not been described before, were identified in the visceral ring.The ultrastructure of the four neurosecretory cell types in the visceral ring is described. The electron microscope revealed that each of the histochemically distinguished secretory substances consists of elementary granules which differ in size and appearance from each other and from the neurosecretory elementary granules which have been described by other authors in the cerebral ganglia and in the lateral lobes.The neurohaemal areas of the neurosecretory cells in the visceral ring are very extensive and include the peripheral parts of the nuchal nerves and of the connectives and nerves of the ganglia of the ring. The perineurium and the adjacent parts of the connective tissue which surround the ganglia, the connectives and the nerves are regarded as additional neurohaemal zones, because in these regions many tiny nerves occur, which l/ 1/ consist mainly of neurosecretory axons ending non-synapticallv near parts of the vascular system. In the perineurium surrounding the cerebral ganglia and their neurohaemal area a similar network of neurosecretory fibres was observed.Indications of release of the secretory material were regularly observed. Release appa rently takes place by exocytosis. % / % /A circadian rhythmicity was observed in the release activity of some of the neurosecretory cell types.

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The cytoplasmic inclusions of the sympathetic neurons of the mouse

Moussa

1952

Am. J. Anat.

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The cytology of the neurones of limnaea stagnalis

Cited by 27 publications

References 9 publications

The Golgi Apparatus in Neurons and Epithelial Cells of the Common Limpet Patella Vulgata

The Golgi Apparatus in Neurons and Epithelial Cells of the Common Limpet Patella Vulgata

Ultrastructure and histochemistry of neurosecretory cells and neurohaemal areas in the pond snail Lymnaea stagnalis (L.)

The cytoplasmic inclusions of the sympathetic neurons of the mouse

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