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Synaptic Remodelling During the Postnatal Differentiation of Peroneal Motoneurones in Kittens

  • M. Simon
  • J. Destombes
  • G. Horcholle-Bossavit
  • D. Thiesson

Abstract

In the adult cat, ultrastructural features of alpha (α) motoneurones (MNs) differ from those of gamma (γ) MNs and it was shown in peroneal motor nuclei that α and γ MNs of similar size could be distinguished without ambiguity (Destombes, Horcholle-Bossavit, Thiesson & Jami, 1992): α MNs have a vacuolated nucleolus and a somatic membrane with a rich equipment of various axonic terminals. They are contacted by five types of synaptic boutons, namely F, S, M, P, C types according to the terminology of Conradi (1969). γ MNs have a compact nucleolus and a somatic membrane with few synaptic boutons, they only receive F and S terminals.

Keywords

Active Zone Axonic Terminal Postnatal Development Somatic Membrane Synaptic Remodelling 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Arvidsson, U., Svedlund, J., Lagerback, P-A. & Cullheim, S. (1987) An ultrastructural study of the synaptology of γ-motoneurones during the postnatal development of the cat. Dev. Brain Res. 37, 303–312.CrossRefGoogle Scholar
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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • M. Simon
    • 1
  • J. Destombes
    • 1
  • G. Horcholle-Bossavit
    • 1
  • D. Thiesson
    • 1
  1. 1.URA CNRS 1448Université René DescartesParis Cedex 06France

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