| Abstract: | In acute experiments on anesthetized rabbits we investigated the spike activity of cold fibers of the infraorbital nerve during a steady decrease in skin temperature from 39 to 7°C at a rate of 0.8 ± 0.05°/min. Analysis of interspike intervals (ISI) in the firing of receptors demonstrated that in the investigated range of skin temperatures the ISI histograms changed significantly several times, reflecting a shift in the pattern of firing. In addition, the reactions of each cold thermoreceptor had individual aspects, which lays the foundation for discussion of the perception of various characteristics of the temperature stimulus of the set of thermoreceptors.I. P. Pavlov Physiology Institute, Russian Academy of Sciences, Saint Petersburg. Translated from Neirofiziologiya, Vol. 24, No. 5, pp. 559–566, September–October, 1992. |
