Abstract
Using practically constant currents the author has carried out the measurement of the utilization time of nociceptors in the human normal anterior teeth under physically sufficient and physiologically appropriate experimental conditions.
The utilization time has been very long and fluctuated between 0.5 and 2.5 sec. Of course, this utilization time is the “practical utilization time” because of the slight diminution of the practically constant effective voltage in the time course of the current flow. Such diminution of the order of 1 : 1000 may be caused by the galvanic polarization of the skin and presumably the tooth.
The author has compared his results with the Sakamoto's theory of electric excitation as well as the strength-duration relation of the nociceptor in the human anterior teeth which was carefully determined by Sakamoto and Matsumoto, and consequently insisted the Sakamoto's opinion that the nociceptor in the human tooth does not exhibit the accommodation.
