G.I. Shulgina - Dr.Sc. (Biol.), Leading Research Scientist, Institute of Higher Nervous Activity and Neurophysiology of RAS, Moscow, Russia, Professor of Faculty of Psychology, State Academy of Slavic Culture, Moscow, Russia. E-mail: shulgina28@mail.ru А.А. Frolov - Dr.Sc. (Biol.), Ph.D. (Phis.-Math.), Chief Research Scientist, Head of Laboratory of Mathematical Neuroscience Learning, Institute of Higher Nervous Activity and Neurophysiology of RAS, Moscow, Russia. Е-mail: aafrolov@mail.ru

Research with the use of determination of cortex location of the proper muscles by means of fMRT show that a decreasing of amplitude of µ-rhythm with frequency 12-13 c/s was the most distinct and stable parameter EEG, if a man intends to do certain motion (Frolov et all. 2014). It was also revealed in this work, that there is an increase of amplitude of µ-rhythm at intention to squeeze a left arm in the primary somatosensor cortex of right arm (VA 3a) µ-rhythm and vice versa. Pfurtscheller and Lopes da Silva (1999) found out the similar phenomenon for the primary sensomotor representative office of right and left arm. In obedience to the generally accepted opinion, to offered by Adrian and Yamagiva, (1935), the increase of amplitude of µ-rhythm is interpreted as a reflection of synchronization, and decline of it as a reflection of desynchronization in process of neurons is in the proper area of cortex. It is known to the present tense, that EEG indeed reflects co-operation of EPSP and IPSP and total oscillation of membrane potential of neurons. Synchronization in-process of neurons rises as a result to almost simultaneously nascent inhibitori pauses. It can be named synchronization on an inhibitory type.On a background activating EEG as a decline of amplitude of slow oscillations of potentials there is a transition from regular (alfa-rhithm, µ-rhythm) or irregular (delta-rhythm) group action potentials to the well-organized tonic impulsation. That is determined the decline of level of the hyperpolarization inhibition, i.e disinhibition. Synchronization in-process of neurons does not go down thus, but rises as compared to the period of rest or inhibition of behavior. That can be named synchronization on an activating type (Shul\'gina, 2007). Information about the increase of synchronousness and efficiency in-process neurons on a background activating EEG well comport with information of O.A. Mokienko et all. (2013) about the increase of level of excitability of motor cortex in these terms and about the positive action of trainings with the use of BCI. If increase of amplitude of rhythms EEG reflects the relative strengthening of inhibitory hyperpolarization processes, in works of Pfurtscheller and Lopes da Silva (1999), Frolov et all (2014) it is revealed that in cortical location of the left hand at intention to squeeze it there is a disinhibition, and in location of the right hand - inhibition, i.e. the opposite relations.

 

1. Frolov A.A., Gusek Z.D., Bobrov P.D., Mokienko O.A., CHernikova L.A., Konovalov R.N. Lokalizacija istochnikov ehlektricheskojj i fokusov gemodinamicheskojj aktivnosti mozga pri voobrazhenii dvizhenijj // Fiziologija cheloveka. 2014. T. 40. № 3. S. 1-12.
2. Pfurtscheller G., Lopes da Silva F.H. Event-related EEG/MEG synchronization and desynchronization: basic principles // Clin Neurophysiol. 1999. V. 110. № 11. P. 1842-1857.
3. Adrian E.D., Yamagiva K. The origin of the Berger rhythm // Brain. 1935. V. 58. P. 323.
4. SHulgina G.I. Aktivacionnyjj i tormoznyjj tipy sinkhronizacii nejjronov golovnogo mozga, genez i funkcionalnoe znachenie // ZHurnal vysshejj nervnojj dejatelnosti im. I.P. Pavlova. 2007. T. T. 57. № 5. S. 533-540.
5. Mokienko O.A., CHernikova L.A., Frolov A.A., Bobrov P.D. Voobrazhenie dvizhenija i ego prakticheskoe primenenie // ZHurnal vysshejj nervnojj dejatelnosti im. I.P. Pavlova. 2013. T. 62. № 2. S. 195-204.