In rats with the persistent alcohol motivation the electrophysiological sleep pattern was studied during ethanol intake, after 24 and 48 hours of alcohol withdrawal. It was established that during the voluntary ethanol intake rats may be divided into two groups: with comparative deficit (1st group) and comparative abundance (2nd group) of REM sleep. Alcohol withdrawal caused differential alterations of sleep-wakefulness cycle: in the 1st group of rats REM sleep was more suppressed while in the 2nd group--more increased in comparison to those during ethanol intake. In all animals the SWS depression, increase of awakenings, the aggravation of falling asleep and decrease of sleep depth were observed. DSIP (0.1 mg/kg, i.p. 1 hour before sleep recording) was found to regulate sleep disorders caused by ethanol withdrawal. It makes the neuropeptide possible to be recommended for ethanol withdrawal syndrome treatment in clinical practice.
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