[Characteristics of EEG-based biofeedback treatment procedures in normal and complicated pregnancy]

Electroencephalographic characteristics during the application of EEG-based biofeedback treatment procedures for non-drug correction of functional disturbances were compared in pregnant women with normal and complicated pregnancy. As compared to normal-pregnancy group, in the abortion-threat group, the initial EEG data were characterized by a significant reduction of alpha-rhythm at the expense of theta and beta enhancement. Average number of successful attempts to voluntary regulate the EEG rhythms was significantly reduced in the abortion threat group (55.4 +/- 4.7%) as compared to the normal group (70.2 +/- 5.0%). The least efficiency was observed for EEG beta-reduction procedures. All patients demonstrated significant positive changes in self-estimated values of health and mood. However, though the anxiety level significantly decreased in the group with normal pregnancy, it increased in the abortion-threat group. Thus, the EEG-based biofeedback procedures were shown to be an effective supplement to conventional methods of complex therapy of pregnancy complications, but they required taking into consideration the EEG and subjective features of the patients in case of complicated pregnancy.