Pizzagalli D, Koenig T, Regard M, Lehmann D
EEG-EP Mapping Laboratory, Department of Neurology, University Hospital, CH-8091, Zurich, Switzerland.
Brain Res Cogn Brain Res. 1999 Jan;7(3):371-7. doi: 10.1016/s0926-6410(98)00040-8.
We investigated whether different, personality-related affective attitudes are associated with different brain electric field (EEG) sources before any emotional challenge (stimulus exposure). A 27-channel EEG was recorded in 15 subjects during eyes-closed resting. After recording, subjects rated 32 images of human faces for affective appeal. The subjects in the first (i.e., most negative) and fourth (i.e., most positive) quartile of general affective attitude were further analyzed. The EEG data (mean=25+/-4. 8 s/subject) were subjected to frequency-domain model dipole source analysis (FFT-Dipole-Approximation), resulting in 3-dimensional intracerebral source locations and strengths for the delta-theta, alpha, and beta EEG frequency band, and for the full range (1.5-30 Hz) band. Subjects with negative attitude (compared to those with positive attitude) showed the following source locations: more inferior for all frequency bands, more anterior for the delta-theta band, more posterior and more right for the alpha, beta and 1.5-30 Hz bands. One year later, the subjects were asked to rate the face images again. The rating scores for the same face images were highly correlated for all subjects, and original and retest affective mean attitude was highly correlated across subjects. The present results show that subjects with different affective attitudes to face images had different active, cerebral, neural populations in a task-free condition prior to viewing the images. We conclude that the brain functional state which implements affective attitude towards face images as a personality feature exists without elicitors, as a continuously present, dynamic feature of brain functioning.
我们研究了在任何情绪挑战（刺激暴露）之前，与人格相关的不同情感态度是否与不同的脑电场（脑电图，EEG）源相关。在15名受试者闭眼休息期间记录了27通道脑电图。记录后，受试者对32张人脸图像的情感吸引力进行评分。对一般情感态度处于第一四分位数（即最消极）和第四四分位数（即最积极）的受试者进行了进一步分析。脑电图数据（平均=25±4.8秒/受试者）进行了频域模型偶极子源分析（快速傅里叶变换-偶极子近似法，FFT-Dipole-Approximation），得出了δ-θ、α和β脑电图频段以及全频段（1.5 - 30赫兹）的三维脑内源位置和强度。消极态度的受试者（与积极态度的受试者相比）显示出以下源位置：所有频段位置更低，δ-θ频段位置更靠前，α、β和1.5 - 30赫兹频段位置更靠后且更靠右。一年后，要求受试者再次对人脸图像进行评分。所有受试者对相同人脸图像的评分高度相关，并且受试者之间原始和复测的情感平均态度高度相关。目前的结果表明，在观看图像之前的无任务状态下，对人脸图像具有不同情感态度的受试者具有不同的活跃脑神经元群体。我们得出结论，作为一种人格特征，对人脸图像实施情感态度的脑功能状态在没有引发因素的情况下存在，是脑功能持续存在的动态特征。
