Contacts between serotoninergic fibres and dorsal horn spinocerebellar tract neurons in the cat and rat: A confocal microscopic study

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MARC

Jankowska, ElzbietaGothenburg University,Göteborgs universitet,Institutionen för fysiologi och farmakologi, Avdelningen för fysiologi,Institute of Physiology and Pharmacology, Dept of Physiology (author)

Contacts between serotoninergic fibres and dorsal horn spinocerebellar tract neurons in the cat and rat: A confocal microscopic study

Article/chapterEnglish1995

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1995

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LIBRIS-ID:oai:gup.ub.gu.se/288337
https://gup.ub.gu.se/publication/288337URI
https://doi.org/10.1016/0306-4522(95)00059-RDOI

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Language:English

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Subject category:art swepub-publicationtype

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Contacts between serotoninergic nerve fibres and dorsal horn dorsal spinocerebellar tract neurons were analysed in order to investigate the morphological basis of actions of serotonin upon dorsal spinocerebellar tract neurons. In a series of experiments dorsal spinocerebellar tract neurons were labelled with intracellularly injected rhodamine-dextran in the cat. The neurons were monosynaptically excited by group II muscle afferents and cutaneous afferents and were identified by antidromic activation following stimuli applied in the cerebellum. In the second series of experiments dorsal spinocerebellar tract neurons were labelled by retrograde transport of Fluorogold injected into the cerebellum in the rat. In both series, serotoninergic fibres were labelled by using a specific anti-serotonin antiserum and were revealed by immunofluorescence. Appositions between the serotoninergic fibres and the cells were inspected with a dual channel confocal microscope. The merged images obtained with the two channels of the microscope were viewed in single optical planes 2 μm apart and in rotated three-dimensional reconstructions. Serotoninergic nerve fibres were found in apposition to cell bodies of all feline dorsal spinocerebellar tract neurons (n = 7) and of 75% of rat dorsal spinocerebellar tract neurons (n = 90). The numbers of putative contacts on cell bodies varied between less than 100 and nearly 300 (mean 160) in the cat and between about five and 30 in the rat. Contacts with dendrites of feline neurons were seen on 96% of 72 dendrites within 300 μm from soma and on 91% of 23 dendrites at distances of 300-500 μm. The number of such contacts varied from less than five to 150 on a single dendrite within these ranges of distances. Their total number within 100 μm from the soma was comparable or exceeded the number of contacts on the soma. © 1995 IBRO.

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Maxwell, D. J. (author)
Dolk, S. (author)
Krutki, P. (author)
Belichenko, P. V. (author)
Dahlström, A. (author)
Göteborgs universitetInstitutionen för fysiologi och farmakologi, Avdelningen för fysiologi (creator_code:org_t)

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In:Neuroscience67, s. 477-4870306-4522

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Basic Medicine

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By the university: University of Gothenburg

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