Abstract: Neurophysiological experiments since the 20s of this century have shown that the compression originally observed in psychological . experiments is also present in the pattern of peripheral neural activity. It is most usually measured in terms of the frequency of the train of the nervous impulses recorded at peripheral sensory neurons. Some investigators have found loguithmic neural function, while others have reported power function. This controversy of specific mathematical rule which best describes the compression has been discussed and unified in this paper by the application of the stimulus - effect model of the brain previously established by the author.

Key words: Neurophysiology, peripheral nervous system, neural compression, nervous impulses generator potential