Delta- and gamma-activity of resting state EEG as one of markers of risk of depressive disorders in migrants of subpolar and polar regions of Siberia

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Natalya Milakhina¹, Sergey Tamozhnikov², Ekaterina Proshina³, Alexandra Karpova⁴, Alexander Savostyanov⁵, Elena Afanaseva⁶
¹Institute of Cytology and Genetics of SB RAS, Novosibirsk, Russia, tashamilka@mail.ru
²State Scientific-Research Institute of Physiology & Basic Medicine, s.tam@physiol.ru
³State Scientific-Research Institute of Physiology & Basic Medicine, Novosibirsk, Russia, proshinaea@physiol.ru
⁴North-Eastern Federal University, Yakutsk, Russia, karpova74@list.ru
⁵Institute of Cytology and Genetics of SB RAS, Novosibirsk, Russia, a-sav@mail.ru
⁶North-Eastern Federal University, Yakutsk, Russia, eb.afanaseva@mail.ru

It is well known, the conditional rest state activates the functional rest network, including the brain default system (DMN) and the central executive network (CEN). At this stage of research, it can be assumed that both the process of adaptation to the polar climate and new social conditions, and the gradual reduction of the risk of depression among migrants, are due to functional changes within these two brain systems, as well as their functional relationships among themselves. Hypothetically, the increased activity of CEN is associated with a higher level of stress associated with moving to new living conditions

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Andrey Bocharov

3 years ago

Thank you for intresting poster presentation. I have 2 clarifying questions.
Could you specify the condition (closed or opened eyes?). Did you present results of closed eyes in the poster?
In the results of the second survey between the migrants and the residents there were differences in spectral power within the posterior medial cortex. In which bands was it? Was it similar to first survey? Did Migrants have a higher spectral power in delta and gamma bands in the posterior medial cortex?

Natalya Milakhina

Reply to Andrey

Hello! Thank you for your questions!
Yes, all the results presented demonstrate the closed eyes conditions. Differences between migrants and residents are presented in gamma and delta groups (highlighted in yellow and red). Migrants had higher gamma and delta rhythm power immediately after moving to Yakutia, a re-study of migrants six months later showed a decrease in the power of the rhythms.