Cell and Tissue Research

, Volume 159, Issue 2, pp 213–225 | Cite as

Cobalt sulphide staining of optic fibres in the brain of the cricket, Gryllus campestris

  • H. -W. Honegger
  • F. W. Schürmann
Article
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Summary

Neuronal projections from one optic lobe to other parts of the brain were stained in the cricket Gryllus campestris using the cobalt sulphide technique and Timm's sulphide-silver method.

The results are: Four tracts directly connect the medulla with the lobula and medulla of the contralateral optic lobe. Direct medullar projections end mainly in the non-glomerular neuropile of the protocerebrum, but also penetrate the calyx of the mushroom bodies, pons and central body in small numbers. A few somata which send fibres into the medulla lie in the pars intercerebralis, in the protocerebrum ventral to the opposite β-lobe, the outer margin of the medulla of the contralateral optic lobe and between deutoand tritocerebrum.

The anatomical and physiological relevance of the stained connections is discussed.

Key words

Insect brain Optic system Medullar fibres Cobalt stain 
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Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • H. -W. Honegger
    • 1
    • 2
  • F. W. Schürmann
    • 1
    • 2
  1. 1.Fachbereich Biologie der Universität KonstanzGermany
  2. 2.Zoologisches Institut der Universität KölnGermany

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