Department of Psychology, Ben-Gurion University of the Negev.
Mental Health Center, Ministry of Health, Beer-Sheva, Israel.
J Pers. 2019 Apr;87(2):295-309. doi: 10.1111/jopy.12391. Epub 2018 Jun 7.
Dissociation refers to a disintegration between psychological elements; common manifestations are embodied in "absorption and imaginative involvement," a propensity for being immersed in a stimulus while oblivious to the environment, and acting without awareness. Trait dissociation was hypothesized to relate to lower EEG signal connectivity, but studies on healthy populations are scarce. The present study set out to examine whether dissociative absorption in a nonclinical sample would be associated with decreased intrahemispheric coherence.
In 84 healthy Israeli soldiers (49% females; M = 22.24, SD = 2.64), resting-state electroencephalography (rsEEG) was recorded for a period of 3 min with eyes closed and 3 min with eyes open.
Decreased coherence was related to high dissociative absorption in the long (frontal-occipital) range, and in one of the pairs of the short range (central-parietal). The effects emerged mostly in the left hemisphere, in both eyes-open and eyes-closed conditions, and for a range of spectral bands, although long-range effects were more pronounced in slow-wave bands (theta and delta).
Dissociative absorption is manifested in segregated cortical activity, supporting the notion that it may represent less integrated mental functioning. The findings contribute to our understanding of the neural correlates of consciousness and personality.
分离是指心理要素之间的解体；常见表现为“沉浸和想象投入”，即沉浸在刺激中而忽略环境，无意识地行动。特质分离被假设与较低的脑电图信号连通性有关，但针对健康人群的研究很少。本研究旨在探讨非临床样本中的分离性吸收是否与半球内相干性降低有关。
在 84 名健康的以色列士兵（女性占 49%；M=22.24，SD=2.64）中，在闭眼和睁眼 3 分钟的时间内记录静息状态脑电图（rsEEG）。
相干性降低与长（额枕）范围的高分离性吸收以及短范围（中央顶叶）的一对相关。这些影响主要出现在左半球，在睁眼和闭眼两种情况下，以及一系列的频谱带中，尽管长程效应在慢波带（θ和δ）更为明显。
分离性吸收表现为分离的皮质活动，支持了它可能代表较少整合的心理功能的观点。这些发现有助于我们理解意识和个性的神经相关性。
