One of the most often reasons of anomalies development of patrimonial activity is absence of the generated patrimonial dominant.

The study has been carried out on the basis of a maternity hospital of Chelyabinsk city. Group of 38 pregnant females sorts on term (38-40 weeks). It was lead monopolar electroencephalography on 11 channels with epselateral ear referent electrodes. Record EEG was carried out on standard procedure. The correlation analysis was carried out with the help of statistical package SPSS version 11.0.

Еру interrelation between anomalies of patrimonial activity and average frequency of a beta-rhythm is established at opening eyes (r = 0,450 at p=0,005), an index of a teta-rhythm (r =-0,419 at p=0,009) at closing eyes in left frontal assignment F1.

The revealed direct interrelation of increase of average frequency of a beta-rhythm in the left frontal assignment and increases in probability of occurrence of anomalies of patrimonial activity allows to specify a hypothesis about connection of expressiveness of high-frequency activity in frontal zones of a brain with formation of a patrimonial dominant.