Xxi. Neurology

2. Transient Probability Distributions of Nerve Impulse Intervals, S. B. Thesis, Department of Physics, M.I. T., June 1964. The time evolution of the distribution of nerve-impulse intervals was examined by measuring histograms at varying times in the stimulus cycle. The distribution width was found to vary inversely as the stimulus strength. There is an indication that the width also depends upon the stimulus rate of change. The inverse of the average frequency was found to be the most reliable statistic in characterizing the response data. The mean, standard deviation, and most probable interval were examined and found useful when applicable. The standard deviation is found to be a function of the mean. For the square-wave response, some nonlinearities have been evaluated and the possible existence of harmonics is discussed. A brief description of electronic pulse-height discrimination has been given. A method for automatic computer analysis is discussed briefly. W. C. Carithers, Jr.