ANALYSIS OF INTERVAL FLUCTUATION OF THE SENSORY NERVE IMPULSE

Abstract

(1) The interval fluctuation of impulses of the tonic nerve fiber from the muscle spindle of a Japanese toad is investigated by method of the time series analysis.
(2) Dividing the interval series into several stationary subseries and computing the serial correlation coefficients, we find that these subseries can be considered as a random process.
(3) In these stationary subseries, not only the absolute value of the standard deviation but also its relative value to the mean interval becomes larger with the increase of the mean interval.
(4) High correlation among the moments of the interval distribution makes us conclude that each of the distributions obtained from the same preparation can be characterized by a single parameter.
(5) Assuming a random fluctuation such as that due to the thermal agitation the equation of distribution is calculated. And comparison is made between the observed and the calculated histograms.