阿尔法波段振荡和情绪:对图像感知研究的综述
Maurizio Codispoti1, Andrea De Cesarei1, Vera Ferrari2
1Department of Psychology, University of Bologna, Bologna, Italy.
Psychophysiology
|September 19, 2023
概括
情绪刺激会触发大脑中增强的α波段和β波段脱同步. 这种神经反应被称为增强事件相关脱同步 (ERD),在图像感知过程中自动发生.
科学领域:
- 认知神经科学 认知神经科学
- 心理生理学 心理生理学
- 情感科学是一种情感科学.
背景情况:
- 阿尔法频段活动是心理生理学研究中一个成熟的衡量标准.
- 以前的研究已经探索了通过情绪刺激对α活动的调节.
- 在情感图像感知过程中,阿尔法调节的特定模式需要系统的审查.
研究的目的:
- 系统地审查有关在图像感知过程中以情感价值调节α波段活动的研究.
- 确定与情绪处理相关的最一致的电生理学模式.
- 调查这种情绪调节的特异性和强制性.
主要方法:
- 对现有心理生理学研究进行系统审查.
- 对脑电图 (EEG) 数据的分析,重点关注α (8-13 Hz) 和低β (8-20 Hz) 频段.
- 在后部传感器上检查与事件相关的脱同步 (ERD) 模式.
主要成果:
- 跨研究的一致发现是,与中性图片相比,在查看情感图片 (愉快和不愉快) 时,增强了与事件相关的α频段脱同步 (ERD).
- 这种增强的alpha ERD并不特定于负面情绪内容.
- 有证据表明低贝塔频率 (8-20 Hz) 的参与,并且这种效应是强制性的,即使在刺激重复和与任务无关的分心因素中也会发生.
结论:
- 增强的alpha ERD是一个强大的神经标志物,用于在图像感知过程中处理情绪,不论其价值.
- 这些发现支持了评估过程对于情绪刺激是强制性的假设.
- 这种增强的ERD可能反映了与激励系统参与相关的皮质刺激性.
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