The pregnancy adaptation processes reflection in the EEG of women with complicated forms course of gestation process

Abstract

The investigations were conducted on a group of women under the threat of pregnancy termination. 139 women have been examined. The degree of the adverse development of pregnancy (respectively, the adaptive capacities of their organism) is possible to determine by the duration of the presence of this diagnosis. So, for example, in some women, the threat was observed only once during the gravidity, but in others — a few times and in different trimesters. 149 EEG of the pregnant women with adverse delivery is characterized by the predominance of lowamplitude activity with the unexpressed parieto-occipital alpha-rhythm (its power is not exceeded 3 μV²) or, on the contrary, the prevalence of hypersynchronous activity with high amplitude and generalized alpharhythm (power exceeded 10 μV²). There are about 32 % of pregnant women with a diagnosis of «threat» in the first group (45 women) and about 45 % (63 women) in the other. It was shown that unstable (at certain women — significant) increasing of high-frequency activity power spectra was observed in the EEG of both groups women in comparison with EEG of women with normal pregnancy. For women with a low degree threat of pregnancy termination there were observed delta activity appearance with a frequency of 3.5 Hz, accompanied by a lowering of the wakefulness level. It is assumed that it is an adequate reaction to the threat of pregnancy termination in the process of effective adaptation to the gravidity development. Refs 22. Figs 2. Tables 1.

Keywords:

adaptation to pregnancy, reduction of the wakefulness level