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Journal of comparative physiology

, Volume 78, Issue 3, pp 307–314 | Cite as

Response of trigeminal ganglion neurons to thermal stimulation of the beak in pigeons

  • Reinhold Necker
Article

Summary

The activity of neurons from the trigeminal ganglion of pigeons have been recorded while cooling or warming the beak. Thermosensitive neurons were seldom compared with mechanosensitive units. From a total of 16 thermosensitive neurons, 13 were excited by cooling and 3 by warming. The impulse frequency strongly depended on temperature. At constant temperatures, constant firing rates were established. The static curves of cold-sensitive units showed, that with decreasing temperature a nearly linear rise in firing rate occurred between about 36 °C and 20 °C. One quantified, warm-sensitive neuron showed, with increasing temperature, a nearly linear rise between about 35 °C and 44 °C. Sudden cooling or warming caused no pronounced overshoot as in mammals. Six cold-sensitive neurons were totally inhibited by rewarming as were 2 warm-sensitive units by cooling. No comparable influence of temperature on the discharge rate of some slowly-adapting mechanoreceptors (pressure stimulus) was exhibited.

Keywords

Discharge Rate Constant Temperature Firing Rate Trigeminal Ganglion Ganglion Neuron 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1972

Authors and Affiliations

  • Reinhold Necker
    • 1
  1. 1.Arbeitsgruppe ThermoregulationInstitut für Tierphysiologie der Ruhr-Universität BochumGermany

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