Journal of comparative physiology

, Volume 132, Issue 2, pp 149–152 | Cite as

Hygro- and thermoreceptive triad in antennal sensillum of the stick insect,Carausius morosus

  • Harald Tichy


The receptor cells in a poreless sensillum on the antenna ofCarausius morosus were examined electrophysiologically. Two of the units are antagonistic regarding humidity, one responding with an increase in impulse frequency to rising humidity (moistair unit) and the other to falling humidity (dry-air unit). Another reacts to falling temperature with a rise in impulse frequency (cold unit). In some cases responses from a fourth unit were also present. Its modality is uncertain. A method of marking the sensillum with a cactus needle for subsequent structural examination after recording is described.


Triad Receptor Cell Stick Insect Impulse Frequency Structural Examination 
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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • Harald Tichy
    • 1
  1. 1.Institut für ZoologieUniversität RegensburgRegensburgFederal Republic of Germany

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