Distal dendrites of frog motor neurons: a computer-aided electron microscopic study of cobalt-filled cells.

Details

Serval ID
serval:BIB_03DA4F04673A
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Distal dendrites of frog motor neurons: a computer-aided electron microscopic study of cobalt-filled cells.
Journal
Journal of neurocytology
Author(s)
Antal M., Kraftsik R., Székely G., van der Loos H.
ISSN
0300-4864
Publication state
Published
Issued date
1986
Peer-reviewed
Oui
Volume
15
Number
3
Pages
303-310
Language
english
Abstract
With the aid of the cobalt labelling technique, frog spinal cord motor neuron dendrites of the subpial dendritic plexus have been identified in serial electron micrographs. Computer reconstructions of various lengths (2.5-9.8 micron) of dendritic segments showed the contours of these dendrites to be highly irregular, and to present many thorn-like projections 0.4-1.8 micron long. Number, size and distribution of synaptic contacts were also determined. Almost half of the synapses occurred at the origins of the thorns and these synapses had the largest contact areas. Only 8 out of 54 synapses analysed were found on thorns and these were the smallest. For the total length of reconstructed dendrites there was, on average, one synapse per 1.2 micron, while 4.4% of the total dendritic surface was covered with synaptic contacts. The functional significance of these distal dendrites and their capacity to influence the soma membrane potential is discussed.
Keywords
Animals, Cobalt, Computers, Dendrites, Microscopy, Electron, Motor Neurons, Pia Mater, Rana esculenta, Spinal Cord, Synapses
Pubmed
Web of science
Create date
30/03/2009 10:49
Last modification date
20/08/2019 12:25
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