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EEG Alpha Asymmetry, Depression, and Cognitive Functioning

EEG Alpha Asymmetry, Depression, and Cognitive Functioning Davidson (1993) has proposed that hemispheric asymmetry in prefrontal as measured by electroencephalographic (EEG) power in the alpha (8-13Hz), is related to reactivity to affectively valenced stimuli. Davidson has proposed further that asymmetry is a stable trait, and that left frontal is a stable marker of vulnerability to depression. In Study 1, we Davidson's formulations by examining differences in frontal EEG alpha among currently depressed, previously depressed, and never subjects. As expected, currently and previously depressed subjects left frontal hypoactivation relative to never depressed controls, but did differ significantly from each other. In Study 2, we explored the associations among frontal EEG asymmetry, response to a negative mood induction endorsement of dysfunctional cognitions, and attentional processing of valenced stimuli. Contrary to predictions, frontal EEG asymmetry was to mood reactivity and cognitive functioning. Theoretical and implications of these findings are discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Cognition & Emotion Taylor & Francis

EEG Alpha Asymmetry, Depression, and Cognitive Functioning

Cognition & Emotion , Volume 12 (3): 30 – May 1, 1998
30 pages

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References (54)

Publisher
Taylor & Francis
Copyright
Copyright Taylor & Francis Group, LLC
ISSN
1464-0600
eISSN
0269-9931
DOI
10.1080/026999398379673
Publisher site
See Article on Publisher Site

Abstract

Davidson (1993) has proposed that hemispheric asymmetry in prefrontal as measured by electroencephalographic (EEG) power in the alpha (8-13Hz), is related to reactivity to affectively valenced stimuli. Davidson has proposed further that asymmetry is a stable trait, and that left frontal is a stable marker of vulnerability to depression. In Study 1, we Davidson's formulations by examining differences in frontal EEG alpha among currently depressed, previously depressed, and never subjects. As expected, currently and previously depressed subjects left frontal hypoactivation relative to never depressed controls, but did differ significantly from each other. In Study 2, we explored the associations among frontal EEG asymmetry, response to a negative mood induction endorsement of dysfunctional cognitions, and attentional processing of valenced stimuli. Contrary to predictions, frontal EEG asymmetry was to mood reactivity and cognitive functioning. Theoretical and implications of these findings are discussed.

Journal

Cognition & EmotionTaylor & Francis

Published: May 1, 1998

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