PMID: 5914698Feb 1, 1966

Electron microscope studies on soma-somatic interneuronal junctions in the corpus pedunculatum of the wood ant (Formica lugubris Zett.)

The Journal of Cell Biology
A M Landolt, H Ris

Abstract

1. The corpora pedunculata of the wood ant (Formica lugubris Zett.) contain densely packed neuron perikarya which are separated by ultrathin glial sheaths. 2. These glial sheaths are occasionally interrupted by round holes with an average surface area of 2.64 micro(2). The holes are designated glial windows since they represent intracellular gaps of glial cytoplasm. 3. The glial windows allow soma-somatic interneuronal junctions. Of all adjacent neurons in a selected neuron pool, only 42% were interconnected by such junctions. 4. The intercellular space at the soma-somatic junctions has an average diameter of 30 A; occasionally, it is collapsed and an external compound membrane ensues. The junctional membranes are characterized by the presence of a subunit pattern of cross-directional electron-opaque lines with a 50- to 70-A periodicity. 5. Morphological signs of chemical transmission are absent in these junctions. On the other hand, there is a striking similarity in structural organization between soma-somatic junctions and electrical synapses described in other species. Therefore, it is suggested that these cell contacts of the ant's "cerebral cortex" are another form of electrical junction. 6. The close proximity of the junc...Continue Reading

References

Feb 1, 1953·Proceedings of the Society for Experimental Biology and Medicine·J D ROBERTSON
Jul 25, 1958·The Journal of Biophysical and Biochemical Cytology·M L WATSON
Jan 15, 1961·Proceedings of the National Academy of Sciences of the United States of America·R GALAMBOS
Feb 1, 1961·The Journal of Biophysical and Biochemical Cytology·J H LUFT
Nov 1, 1962·The Journal of Cell Biology·D C PEASE
Dec 1, 1962·Journal of Ultrastructure Research·O TRUJILLO-CENOZ, J MELAMED
Nov 1, 1961·The Journal of General Physiology·A WATANABE, H GRUNDFEST
Oct 1, 1963·The Journal of Cell Biology·J D ROBERTSOND E STAGE
Apr 1, 1964·Journal of Ultrastructure Research·F S SJOESTRAND, L G ELFVIN
Sep 1, 1964·The Journal of Cell Biology·W R Loewenstein, Y KANNO
Sep 1, 1964·The Journal of Cell Biology·D E KELLY, S W SMITH
Feb 1, 1965·Experimental Cell Research·V K HOPSU, A U ARSTILA

Citations

Jan 1, 1967·Zeitschrift für Zellforschung und mikroskopische Anatomie·G Mancini, N Frontali
Jan 1, 1972·Zeitschrift für Zellforschung und mikroskopische Anatomie·R S SohalE F Couch
Dec 1, 1996·Journal of Neurocytology·H A BaylisN J Lane

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Ants
Electron Microscopy

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