Journal of comparative physiology

, Volume 121, Issue 1, pp 1–13 | Cite as

Auditory interneurons in the cricketTeleogryllus oceanicus: Physiological and anatomical properties

  • George B. Casaday
  • Ronald R. Hoy


  1. 1.

    The morphology and physiology of two acoustic interneurons in the prothoracic ganglion have been studied by the use of extracellular microelectrodes filled with cobalt chloride.

  2. 2.

    Interneuron 1 is inhibited by 5 kHz tones (Fig. 1) and does not reliably code the temporal pattern of the calling song (Fig. 2). It is unique in each half of the prothoracic ganglion, sends dendrites unilaterally into the acoustic neuropile, and sends its axon to the brain (Figs. 3, 4).

  3. 3.

    Interneuron 2 is excited tonically by 5 kHz tones (Figs. 5, 6) and accurately codes the temporal structure of song (Fig. 7). One pair of these neurons is present in the prothoracic ganglion. Each interneuron 2 projects to both left and right acoustic neuropiles, but has no process leaving the ganglion (Figs. 8, 9); it is an intra-ganglionic interneuron.

  4. 4.

    The reliability of the relatively new extracellular cobalt staining procedure is discussed.



Chloride Cobalt Temporal Pattern Temporal Structure Staining Procedure 
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Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • George B. Casaday
    • 1
  • Ronald R. Hoy
    • 1
  1. 1.Section of Neurobiology and Behavior, Langmuir LaboratoryCornell UniversityIthacaUSA

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