Abstract
Refractoriness of main and accessory fibres into Pacinian corpuscle has been measured with two impulses generated by mechanical stimuli or antidromical electrical stimuli.
1) The depression produced by a preceding stimulus of the Pacinian corpuscle, resulting from mechanical stimulus has been measured below 1 msec, and its value is smaller than transmission time from corpuscle to main fibre, and also than its of main fibre itself.
2) The absolute refractoriness of transmission from corpuscle to the main fibre is about 1. 3msec.
3) The absolute refractoriness of the main fibre itself is about 2 msec.
4) The recovery time for the complete transmission from corpuscle to the main fibre, needs 5 to 6 msec.
5) The absolute refractoriness of an accessory fibre is 2030msec.
6) The complete recovery time for C fibres needs about 200msec.
From above results we can consider that the most popular inserval of spontaneous discharge in main fibre is 5 to 6 msec and the accsssory fibres is 200msec.
