AUDIOVIZUĀLĀS STIMULĀCIJAS IETEKME UZ MUZIKĀLO IMPROVIZĀCIJU: EEG HIPERSKENĒŠANAS GADĪJUMA IZPĒTE
Atslēgvārdi:
Elektroencefalogrāfija (EEG), hiperskenēšana, audiovizuālā stimulācija (AVS), smadzeņu signālu svārstīgums (BSV), Lempela-Zīva (LZ) algoritms, smadzeņu sinhronizācija (IBS), Grendžera cēloņsakarība (GC), muzikālā improvizācijaAnotācija
Šī gadījuma izpētes mērķis ir izpētīt EEG signālā fiksēto audiovizuālās stimulācijas (AVS) ietekmi uz smadzeņu signālu svārstīgumu (BSV) un smadzeņu sinhronizāciju (IBS) muzikālās improvizācijas laikā.
EEG hiperskanēšanas dati 500 Hz izšķirtspējā tika reģistrēti no 32 elektrodiem, vienlaikus no vairākiem indivīdiem. Ieraksti tika precīzi saskaņoti laikā, lai katrs datu atskaites punkts no viena indivīda atbilstu tieši tam pašam laika momentam arī pārējiem. Dati tika reģistrēti katram dalībniekam pirms AVS stimulācijas, tās laikā un pēc tās, kā arī improvizācijas uzdevumu laikā. BSV un IBS mērījumiem tika izmantoti Lempela–Zīva (Lempel – Ziv, LZ) algoritms un Grendžera cēloņsakarība (Granger Causality, GC), attiecīgi mērot smadzeņu signālu mainīgumu un smadzeņu sinhronizāciju starp dalībnieku smadzenēm un viena indivīda smadzeņu ietvaros.
Rezultāti norāda, ka grupās balstītas AVS vai grupu neirofīdbeka (neurofeedback) programmas var radīt spēcīgus sociāli veicinošus efektus, pozitīvi ietekmējot mijiedarbības kvalitāti un rezultātus pēc stimulācijas.
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