Federal official budgetary institution «Scientific research institute of experimental medicine» of Northwest department of the Russian academy of medical sciences, St.-Petersburg, Russia, email@example.com
Listening of pleasant music led to augmentation of teta-activity (Sammler et al., 2007). The presentation of consonant chords, unlike dissonant, also led to increase in power a theta rhythm(Maslennikova of A.V., et al., 2012). Thus, dynamics of teta-activity at acoustic influences could be a measure of an assessment of emotional perception. Thereupon, we examine influence of procedure of listening of an acoustic image of own EEG in real time on bioelectric activity in a range a theta rhythm.
40 healthy participants, 25 men and 15 women at the age from 20 till 35 years was inspect out. The first group of examinees, 20 persons, were listening to an acoustic image of own EEG in real time.The second group (control), 20 persons, were listening to the record of the acoustic image of EEG made in advance on one of participants. The algorithm of building of an acoustic image of EEG consisting in the coordination of spectrotemporal parameters of bioelectric activity of a brain with frequency parametres of acoustic stimulants.Attitudes of frequencies of the pitch of acoustic stimulants correspond to musical sound series. Registration of EEG were carried out by monopolyarno in points: Fp1, Fp2, O1, O2 of rather incorporated aural electrodes at the occlud eyes. All canals of registration of EEG transform simultaneously and independently. The receiv notes show according to the side of registration of EEG. Duration of a session compounding 20 minutes. In the analysis the assessment of a lobe of frequency periods of a theta rythm in 2nd minutes in the beginning and in the end of a session were manufactur. After a session examinees estimate an acoustic image of EEG on a seven-ball scale: «the pleasant - unpleasant».
In the first group of examinees which listen to an acoustic image of own EEG, in occipital abductions the authentic augmentation of a lobe of frequency periods of a theta rythm were observ. In О1 the theta rythm had gr with 6,7±3,0 to 15,4±9,9 %, (p <0,01); in О2 with 6,1±3,4 to 14,0±9,8 %, (p <0,01). Between points О1 and О2 authentic differences it were not observed. In frontal abductions of significant dynamics of teta-activity it are not reveal. In control in frontal and occipital abductions of authentic changes of teta-activity it are not reveal.The authentic difference (p<0,01) lobes of frequency periods of a theta rhythm in the end of a session between groups are discover by in occipital points: average values of a lobe of teta-activity in points О1, О2 in control 10,3±9,1 %, in groupof listening of an acoustic image of own EEG 14,7±9,8 %. Value judgment of perception of an acoustic mode of EEG in the first bunch were higher, than in control, accordingly: 6,0±1,5 point and 5,1±1,8 point (p <0,01).
Listening of an acoustic image of own EEG led to substantial growth of teta-activity. Express dynamics of a theta rythm are accompanied by a high level of preference of an acoustic image of EEG show in real time. It is possible to assume that the presentation of acoustic stimulants the skorrelirovannykh with endogenny bioelectric activity are the significant factor of an activation the emotsiogennykh of frames of a brain. It is possible to assume that the presentation of acoustic stimulus connected with own bioelectric activity are the significant factor of activation of the emotions-related brain structures.