DePascalis V, Penna P M
Dipartimento di Psicologia, Universita di Roma, La Sapienza, Italia.
Int J Clin Exp Hypn. 1990 Apr;38(2):125-38. doi: 10.1080/00207149008414507.
The present study evaluates changes in left and right 40-Hz EEG production for 19 high and 20 low hypnotizable female Ss during the hypnotic induction and the administration of the Stanford Hypnotic Susceptibility Scale, Form C (SHSS:C) of the Weitzenhoffer and Hilgard (1962). Scalp recorded 40-Hz EEG density was obtained from the middle of the O1-P3-T5 and O2-P4-T6 triangles. As the hypnotic induction proceeded, high hypnotizable Ss exhibited a shift to greater right-hemisphere activity as compared to a waking-state rest condition. In contrast, low hypnotizable Ss, showed a reduction in left- and right-hemisphere activity. No differences between groups for SHSS:C ideomotor items were observed. A main effect for Hypnotizability among SHSS:C imaginative items was found. A Hypnotizability x Hemisphere x Trial interaction was found for both sensory distortion and imaginative SHSS:C items. A comparison was made between low versus high hypnotizable Ss of 40-Hz EEG activity while they passed the same item. The results of these comparisons indicate that differences in brain activity might be partially related to the differences between experiencing a hypnotic suggestion or failing to do so. Significant relationships between 40-Hz EEG production and hypnotizability and 40-Hz EEG production and level of amnesia were also found.
本研究评估了19名高催眠易感性和20名低催眠易感性的女性被试在催眠诱导过程以及使用韦岑霍弗和希尔加德（1962年）编制的斯坦福催眠易感性量表C型（SHSS:C）时，左右脑40赫兹脑电图产生的变化。头皮记录的40赫兹脑电图密度是从O1 - P3 - T5和O2 - P4 - T6三角区的中点获得的。随着催眠诱导的进行，与清醒状态下的休息条件相比，高催眠易感性被试表现出向更强的右半球活动转变。相比之下，低催眠易感性被试的左右半球活动都有所减少。在SHSS:C的观念运动项目上未观察到组间差异。在SHSS:C的想象项目中发现了催眠易感性的主效应。在感觉扭曲和想象的SHSS:C项目中，均发现了催眠易感性×半球×试验的交互作用。对通过相同项目的低催眠易感性和高催眠易感性被试的40赫兹脑电图活动进行了比较。这些比较结果表明，大脑活动的差异可能部分与体验催眠暗示与否的差异有关。还发现了40赫兹脑电图产生与催眠易感性之间以及40赫兹脑电图产生与遗忘程度之间的显著关系。
