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  • 1
    Electronic Resource
    Electronic Resource
    Etude ultrastructurale de l'innervation des glandes salivaires postérieures chez Octopus vulgaris (1972)
    Springer
    Cell & tissue research 132 (1972), S. 67-78 
    Details
    ISSN: 1432-0878
    Keywords: Salivary glands ; Octopus ; Secretory fibers ; Synapse ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Les nerfs sécréteurs pénètrent dans l'épithélium des tubules au niveau du hile de la glande. Leurs subdivisions se disposent entre les cellules épithéliales ou leurs replis, et gardent toujours une situation extracellulaire. Les plus gros faisceaux d'axones sont encore entourés par des cellules satellites qu'on n'arrive plus à discerner autour des faisceaux moins importants ou autour des fibres isolées. Les axones sont alors directement au contact des cellules glandulaires. On a pu trouver des synapses neuro-glandulaires avec des spécialisations membranaires asymétriques comparables à celles décrites dans le système nerveux central des Vertébrés. Les fibres sécrétrices variqueuses contiennent d'autre part des vésicules de types variés, semblables à celles des troncs sécréteurs et moteurs du canal, et à celles des fibres motrices de la glande. La signification de ces vésicules a été discutée en relation avec l'existence possible d'amines biogènes diverses dans les fibres nerveuses.
    Notes: Summary The secretory nerves enter the tubule epithelium at the level of the gland hilus. Their subdivisions being located between the epithelial cells or their infoldings, have always extracellular position. Satellite cells still surround the largest axon bundles, but are no longer discernable round the smaller bundles or isolated axons which are thus in direct apposition with glandular cells. Neuro-glandular synapses, with asymetric membrane specialisations similar to those found in the central nervous system of vertebrates, have been found. The varicose secretory fibers contain various types of vesicles, similar to those found in the secretory or the motor trunks at the duct level, or in the gland motor fibers. The significance of these vesicles is discussed, in reference to the possible existence of various biogenic amines in the nerve fibers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310297
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Etude ultrastructurale de l'innervation des glandes salivaires postérieures chez Octopus vulgaris (1972)
    Springer
    Cell & tissue research 132 (1972), S. 51-65 
    Details
    ISSN: 1432-0878
    Keywords: Salivary glands ; Octopus ; Innervation of musculature ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Les fibres nerveuses, souvent composées, qu'on peut trouver dans le tissu conjonctif séparant les fibres musculaires du canal, ou les tubules de la glande, sont très comparables morphologiquement aux fibres des troncs moteurs. Leurs cellules satellites, qui contiennent de grosses inclusions, nombreuses et très denses aux électrons, engainent les axones pratiquement jusqu'au niveau des terminaisons. Les jonctions neuromusculaires sont caractérisées par l'accumulation de petites vésicules claires, accompagnées de quelques vésicules plus grandes et à »coeur« dense. Les axones présentent aussi le long de leur trajet des segments plus ou moins dilatés où existent des vésicules de types très variés, et dont la signification est discutée.
    Notes: Summary Nervous fibers, often composite, can be found in the connective tissue between the duct muscular fibers, or the gland tubules. They are morphologically similar to the motor trunks fibers. Their satellite cells, containing numerous electron-opaque large inclusions, can be seen round the axons nearly to the nerve endings. Neuromuscular junctions are characterized by the accumulation of small clear vesicles, intermingled with some larger dense-cored vesicles. Axonal swellings, with numerous vesicles of various types, can also be seen along the course of the nerve fibers; their significance is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310296
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    An electron microscopic radioautographic study of the uptake of tritiated serotonin by nerve fibres in the posterior salivary duct and gland of cephalopods (1975)
    Springer
    Cell & tissue research 161 (1975), S. 351-371 
    Details
    ISSN: 1432-0878
    Keywords: Salivary nerves ; Octopus ; Serotonin ; EM-radioautography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the posterior salivary duct and gland of Octopus vulgaris and of Eledone cirrhosa, the duct secretory nerve trunks and their ramifications in the gland tubules include many fibres that incorporate labelled serotonin. However, there are also unlabelled secretory fibres, which cannot be discriminated from incorporating fibres on morphological grounds. Neuroglandular junctions are not apparently established by incorporating fibres. In the duct, the motor nerve trunks contain a small number of labelled fibres, and nerve bundles supplying the duct muscle contain, in variable proportions, serotonin incorporating fibres. Both labelled and unlabelled nerve fibres reach the duct muscle fibres, but neuromuscular junctions involve only unlabelled presynaptic fibres. The nerve fibres which join the gland muscle are usually unlabelled, and the small quota of incorporating fibres in the motor trunks apparently supply only duct tissues. Both secretory and motor trunks, originating from different ganglia, can be considered to contain heterogeneous fibres, releasing different neurotransmitters at the terminals. Certain of these fibres could be serotoninergic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220004
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Etude ultrastructurale de l'innervation des glandes salivaires postérieures chez Octopus vulgaris (1972)
    Springer
    Cell & tissue research 132 (1972), S. 35-49 
    Details
    ISSN: 1432-0878
    Keywords: Salivary glands ; Octopus ; Nerves ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Le canal salivaire contient dans sa paroi deux types de nerfs, moteurs et sécréteurs. Le diamètre des fibres nerveuses est en moyenne plus faible dans les nerfs moteurs, où il diminue encore en direction des glandes, tandis qu'au contraire celui des fibres sécrétrices augmente, accentuant ainsi les différences morphologiques entre les deux ners. Ces différences de calibre entre les fibres sont en rapport avec le nombre plus ou moins élevé des neurites qu'elles comportent, et dont les mésaxones ont des formes variées. Les caractères cytologiques des cellules satellites et des axones des deux types de nerfs sont comparables. Les axones contiennent des vésicules de types morphologiques très divers dont la signification est discutée.
    Notes: Summary Two types of nerves, motor and secretory, are found in the wall of the salivary duct. The average diameter of the motor fibers is smaller and decreases still more towards the glands, while on the contrary it increases for the secretory fibers. The disparity of diameter between the two types of fibers is due to the different number of neurites they contain, embedded in satellite cells with mesaxons of various forms. Axons and satellite cells have similar cytological features in the two types of nerves. Vesicles of several morphological types occur in the axons; their significance is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310295
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Ultrastructural study of the organization of axonal agranular reticulum inOctopus nerve (1974)
    Springer
    Journal of neurocytology 3 (1974), S. 513-523 
    Details
    ISSN: 1573-7381
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the large nerve trunks of the posterior salivary duct ofOctopus macropus, part of the axonal agranular reticulum has an obvious peripheral position, analogous to the subsurface cisternae of certain vertebrate neuronal perikarya. Examination of semi-serial sections shows that these peripheral reticulum elements are part of a peripheral tubular network, itself continuous with a more central network of irregularly varicose anastomosing tubules. Possible involvement of the axonal reticulum in metabolite transport or impulse conduction is considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01098737
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    Paper (German National Licenses)
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