[Effect of the temperature of different skin layers on the spike activity of cold thermoreceptors].

Changing of skin surface temperature by 18 degrees (from 22 degrees to 40 degrees) induced about 4.5 degrees temperature oscillations at 2--3 mm depth with 5--7 min delay. Simultaneous recording of activity of the rabbit upper lip cold thermoreceptors revealed that in 9 thermoreceptors alteration of activity occurred synchronously with skin surface temperature changes. In 7 thermoreceptors changes of activity were related to deep skin layer temperature. Localization of thermoreceptors in different skin layers seems to enable the organism to assess direction and intensity of the warmth flow spreading through the skin.