Matsumoto Atsushi, Ichikawa Yoko, Kanayama Noriaki, Ohira Hideki, Iidaka Tetsuya
Department of Psychology, Nagoya University, Nagoya, Japan.
Psychophysiology. 2006 Nov;43(6):533-40. doi: 10.1111/j.1469-8986.2006.00461.x.
In the present study, we investigated the gamma band response and its phase synchrony between electrodes in alexithymia, which is characterized by a disability in identifying and describing feelings. Individuals with high and low alexithymia scores were selected according to the scores on the 20-item Toronto Alexithymia Scale. EEG was recorded from alexithymic and nonalexithymic persons viewing emotionally negative or neutral stimuli. Nonalexithymic persons exhibited increased gamma band power and phase synchronization at the 400-450-ms time window when processing emotionally negative stimuli. Neither enhanced gamma band power nor phase synchronization was observed in alexithymic persons in the negative emotion condition. These results suggest that gamma band activity reflects emotional processing, and alexithymic persons may have a deficit in communication between brain regions or in the utilization of memory or emotional information during the processing of emotional stimuli.
在本研究中，我们调查了述情障碍患者电极间的伽马波段反应及其相位同步性。述情障碍的特征是在识别和描述情感方面存在障碍。根据20项多伦多述情障碍量表的得分，选取了述情障碍得分高和低的个体。记录了述情障碍者和非述情障碍者在观看情绪消极或中性刺激时的脑电图。非述情障碍者在处理情绪消极刺激时，在400 - 450毫秒的时间窗口内伽马波段功率和相位同步性增加。在消极情绪条件下，述情障碍者既未观察到伽马波段功率增强，也未观察到相位同步。这些结果表明，伽马波段活动反映了情绪处理过程，并且述情障碍者在处理情绪刺激时，可能在脑区之间的交流或记忆或情绪信息的利用方面存在缺陷。
