[The frequency and sequence of the biopotentials of the cold thermoreceptors at different skin temperatures].

Electrical activity of the skin cold thermoreceptors was studied in the rabbit nasolabial area at a gradually decreasing temperature of the skin from 39.0 to 7.7 degrees C. The range of firing rate, the temperature of the maximal discharge, and the character of the discharge sequence at different skin temperature, were recorded for every thermoreceptor. The majority of the thermoreceptors were characterized by bursts of discharges (2-10 and more) at a certain skin temperature. The analysis of the data obtained revealed a wide variety of responses of the cold thermoreceptors to continuous drop of the skin temperature.