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  • 1
    Electronic Resource
    Electronic Resource
    Anatomy of giant serotonin-containing neurones in the cerebral ganglia of Helix pomatia and Limax maximus (1973)
    Springer
    Cell & tissue research 143 (1973), S. 1-20 
    Details
    ISSN: 1432-0878
    Keywords: Neurones ; Gastropod ; Cerebral ganglia ; Serotonin ; Light and electron microscopy, cytochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary There is a giant serotonin-containing neurone (GSC) in each cerebral ganglion of Helix pomatia and Limax maximus. In Helix, presynaptic endings of the GSCs are located in the buccal ganglia and peripheral musculature. Dense-cored vesicles of mean diameter 100 nm were observed in the perikarya and the axon branches of the GSCs within the cerebral ganglia. Evidence is presented which suggests that these vesicles sequester serotonin. Vesicles with a similar appearance are present in the presumed presynaptic endings of the GSC in Helix. These endings selectively accumulate tritiated serotonin. Axonal processes containing agranular vesicles (mean diameter 50 nm), or granular vesicles (50–100 nm diameter), or both, make close contact with the fine axon branches of the GSCs within the cerebral ganglion neuropile. Some of these axon processes appear to be presynaptic endings making synaptic connections with the GSCs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307447
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Uptake of serotonin, 5-hydroxytryptophan and tryptophan by giant serotonin-containing neurones and other neurones in the central nervous system of the snail (Helix pomatia) (1973)
    Springer
    Cell & tissue research 143 (1973), S. 21-35 
    Details
    ISSN: 1432-0878
    Keywords: Central nervous system ; Helix pomatia ; Neurones ; Uptake of serotonin, 5-hydroxytryptophan, tryptophan ; Autoradiography, Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Following exposure to tritiated 5-HTP, silver grains were observed over the perikarya of the GSCs (Giant serotonin cells) of Helix pomatia and other known serotonin-containing neurones in light and electron microscope autoradiograms. There was no indication that the 5-HTP was taken up by nerve endings or by non-nervous structures. The distribution of radioactivity was completely different in autoradiograms of tissue exposed to tritiated serotonin. Silver grains, often in very high concentrations, were observed only over certain fine axon branches and processes thought to be nerve endings. Electron microscope autoradiography showed that these processes contained small dense-cored vesicles, morphologically identical to those thought to sequester serotonin in the perikarya of the GSCs. The accumulation of tritiated tryptophan was less specific; all the neurone perikarya showed an accumulation of radioactivity after exposure to this substance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307448
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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