Cell and Tissue Research

, Volume 224, Issue 1, pp 233–238

Neurosecretory cells in the circadian-clock system of the scorpion, Androctonus australis

  • Günther Fleissner
  • Stefan Heinrichs
Short Communication

DOI: 10.1007/BF00217282

Cite this article as:
Fleissner, G. & Heinrichs, S. Cell Tissue Res. (1982) 224: 233. doi:10.1007/BF00217282


The somata of the efferent neurosecretory fibers that control the circadian sensitivity rhythm in the median eyes of the scorpion, Androctonus australis, were detected in the brain by retrograde labeling with Lucifer Yellow CH. A total of 20–40 neurons are arranged in two groups displaying a bilaterally symmetrical, marginal position near the circumesophageal connectives. Half the cells in each group send fibers into the ipsilateral optic nerve; the fibers from the other half enter the contralateral optic nerve.

Key words

Neurosecretory cellsScorpionCircadian clockLucifer Yellow

Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • Günther Fleissner
    • 1
  • Stefan Heinrichs
    • 1
  1. 1.Arbeitskreis Neurobiologie Circadianer Rhythmen, Zoologisches InstitutFachbereich Biologie der Johann Wolfgang Goethe UniversitätFrankfurt am MainBundesrepublik Deutschland
  2. 2.Fachbereich Biologie/Zoologie der UniversitätFrankfurt/MGermany