Hiltunen Seppo, Karevaara Maria, Virta Maarit, Makkonen Tommi, Kallio Sakari, Paavilainen Petri
Teaching and Learning Services, University Services, University of Helsinki, Finland.
Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Finland.
Heliyon. 2021 Apr 29;7(4):e06871. doi: 10.1016/j.heliyon.2021.e06871. eCollection 2021 Apr.
EEG spectral-power density was analyzed in a group of nine highly hypnotizable subjects via ten frontal, central, parietal, and occipital electrodes under four conditions: 1) wake state, 2) neutral hypnosis, 3) hypnotic suggestion for altering perception of tones, and 4) post-hypnosis. Results indicate no theta-power changes between conditions, challenging previous findings that increased theta power is a marker of hypnosis. A decrease in gamma power under hypnotic suggestion and an almost significant decrease under neutral hypnosis were observed, compared to post-hypnosis. Anteroposterior power distribution remained stable over all conditions. The results are discussed and compared to earlier studies, which report heterogenous findings.
通过十个额部、中央、顶叶和枕叶电极，在四种条件下对一组九名高度可催眠的受试者的脑电图频谱功率密度进行了分析：1）清醒状态，2）中性催眠，3）改变音调感知的催眠暗示，4）催眠后。结果表明，不同条件下θ波功率没有变化，这对之前认为θ波功率增加是催眠标志的研究结果提出了挑战。与催眠后相比，观察到在催眠暗示下γ波功率降低，在中性催眠下几乎有显著降低。在所有条件下，前后功率分布保持稳定。对结果进行了讨论，并与早期报告结果各异的研究进行了比较。
