Frontal EEG alpha asymmetry, depression, and cognitive functioning
Frontal EEG alpha asymmetry, depression, and cognitive functioning
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DOI：
10.1080/026999398379673
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发表时间：
1998-05-01
影响因子：
2.6
通讯作者：
Rosenfeld, JP
中科院分区：
文献类型：
--
作者：
Gotlib, IH;Ranganath, C;Rosenfeld, JP
Davidson（1993）提出，通过α频段（8- 13 Hz）的脑电图（EEG）功率测量，前额叶激活的半球不对称性与对情感效价刺激的反应有关。戴维森进一步提出，不对称性是一种稳定的特质，左额叶功能减退是易患抑郁症的一个稳定标志。在研究1中，我们通过检查当前抑郁、先前抑郁和从未抑郁的受试者之间额叶EEG α不对称性的差异来测试Davidson的公式。正如预期的那样，目前和以前抑郁的受试者显示左额叶功能减退相对于从未抑郁的控制，但没有显着差异。在研究2中，我们探讨了额叶脑电不对称，反应的负面情绪诱导程序，认可的功能失调的认知，注意力处理的valenced刺激之间的关联。与预测相反，额叶脑电图不对称与情绪反应和认知功能无关。这些研究结果的理论和方法的影响进行了讨论。
Davidson (1993) has proposed that hemispheric asymmetry in prefrontal activation, as measured by electroencephalographic (EEG) power in the alpha band (8-13Hz), is related to reactivity to affectively valenced stimuli. Davidson has proposed further that asymmetry is a stable trait, and that left frontal hypoactivation is a stable marker of vulnerability to depression. In Study 1, we tested Davidson's formulations by examining differences in frontal EEG alpha asymmetry among currently depressed, previously depressed, and never depressed subjects. As expected, currently and previously depressed subjects showed left frontal hypoactivation relative to never depressed controls, but did not differ significantly from each other. In Study 2, we explored the associations among frontal EEG asymmetry, response to a negative mood induction procedure, endorsement of dysfunctional cognitions, and attentional processing of valenced stimuli. Contrary to predictions, frontal EEG asymmetry was unrelated to mood reactivity and cognitive functioning. Theoretical and methodological implications of these findings are discussed.