f (−n) and f (n). The concept of the uniformity in this case is spread both to the semantics, and to the statistics, or to this or another together. Separation with time can or cannot be absent. The information content at frequency f (0), naturally, can not depend upon the information transmitted at frequencies f (−n) and f (n). This is explained by the specific place of the central source in system, and also by the symmetry of the system with respect to the central frequency f (0). Condition (5) can serve as on of the simple conditions for fulfilling conjunction (9). Von Horner concentrated his attention on it in the above mentioned work. It is true that he spoke about an absolute band of frequencies, and expression (2) determines the equality of the relative frequencies, which substantially facilitates the detection of the frequency f (0).
Subsequently after establishing frequencies f (n) and f (−n) track- ing can be accomplished on frequency f (0) according to (2).
2. Biological Clock
It is possible to consider the EEG rhythms as rhythms in the system of counting time. To calculate the approximate values of all possible periods (or frequencies) of EEG-rhythms it is possible to use the following empirical formula (1):
The table gives the values of frequencies f (n), f (−n) and, where this is convenient, the value of the corresponding periods. If we limit the life of a man to 200 years, then the maximum length of the half-cycle should also be equal to 400 years. Hence we get that the rhythms, which lie beyond the limits of a given frequency are not of a physiological meaning. Thus, the entire set of EEG rhythms should not exceed 22 (± 11 rhythms). The alpha-rhythm is in this case 23rd in counting and zero in order.
The relative width of the band of the 11th rhythm, according to (7) is close to two octaves. The shortest subrhythms of this