Elsevier

Biological Psychiatry

Volume 33, Issues 8–9, 15 April–1 May 1993, Pages 642-646
Biological Psychiatry

Regional electroencephalographic asymmetries in bipolar seasonal affective disorder before and after exposure to bright light

https://doi.org/10.1016/0006-3223(93)90104-LGet rights and content

Abstract

Electroencephalographic (EEG) asymmetries found in nonseasonal depression were examined in seasonal affective disorder before and after bright-light exposure. Subjects with seasonal depression demonstrated the expected pattern of frontal asymmetry both when depressed and following light-induced remission. Right-hemisphere EEG coherence, by contrast, served as a state-dependent indicator of seasonal depression.

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    This research was partially supported by NIMH research training fellowship 5T32-MH17069-07 (JJA), NIMH research grant MH-37195 (RAD), and a grant from the University of Minnesota Graduate School (WGI).

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