Alcoholism: Clinical and Experimental Research



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Alcoholism: Clinical and Experimental Research


Volume 31, Issue 1
Alcoholism: Clinical and Experimental Research banner





Sleep Electroencephalographic Spectral Power After Withdrawal from Alcohol in Alcohol‐Dependent Patients




Bernd Feige

Department of Psychiatry and Psychotherapy, University of Freiburg, Freiburg, Germany.


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Susanne Scaal

Department of Psychiatry and Psychotherapy, University of Freiburg, Freiburg, Germany.


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Magdolna Hornyak

Department of Psychiatry and Psychotherapy, University of Freiburg, Freiburg, Germany.


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Horst  Gann

Department of Psychiatry and Psychotherapy, University of Freiburg, Freiburg, Germany.


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Dieter Riemann

Department of Psychiatry and Psychotherapy, University of Freiburg, Freiburg, Germany.


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First published: 08 December 2006

https://doi.org/10.1111/j.1530-0277.2006.00260.x

Cited by: 29



Reprint requests: Dr. Bernd Feige, Department of Psychiatry and Psychotherapy, Hauptstraße 5, Freiburg 79104, Germany; Fax: +49‐761‐270‐6619; E‐Mail: Bernd.Feige@gmx.net



This study was supported by the German Ministry for Education and Research (BMBF; FKZ 01 EB 9413).







Abstract




Background: Dysfunctional hyperarousal is suspected to be a neurophysiological determinant of relapse in abstinent alcohol‐dependent patients. In the present study, we used spectral power analysis of the sleep electroencephalographic (EEG) to quantify brain activity during sleep in patients during subacute withdrawal as well as in control subjects. Our hypothesis was that the subgroup of patients who relapsed within the 3 months to follow‐up would exhibit‐increased dysfunctional arousal manifested by higher‐frequency (β) EEG power during sleep.



Methods: Twenty‐six alcohol‐dependent in‐patients were examined with polysomnography over 2 nights 2 to 3 weeks after withdrawal. At the 3‐month clinical follow‐up assessment, 12 of them had relapsed and 14 abstained. The control group consisted of 23 healthy subjects similar to the patients with alcohol dependence in age and gender distribution. Spectral sleep EEG analysis was performed on both nights (adaptation and baseline) of all subjects. Logarithmic artifact‐controlled spectral band power of sleep stage 2 and rapid eye movement (REM) sleep was analyzed for Group, Gender, and Age effects using multiple analyses of covariance. Three groups were compared with the Group factor: relapsers, abstainers, and controls.



Results: Generally, both Group and Age effects were significant for the second, baseline night for the visually scored sleep parameters, while spectral EEG parameters showed significant differences in the adaptation night. In the adaptation night, a significant enhancement in the β2 band (24–32 Hz) was seen in REM sleep in relapsers relative to both abstainers and controls.



Conclusions: The β2 increase could be interpreted as a sign of dysfunctional arousal during REM sleep “unmasked” by the additional stressor of sleep environment adaptation. Its determinants are likely to be both premorbid and drinking history related.







Citing Literature

Number of times cited: 29




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