0262 Sleep-wake cycle circadian disruption after chronic alcohol intake in a rat model of anxiety

Alcohol intake can produce disruptions in sleep-wake cycle, including circadian alterations like phase shifts. Alcohol intake is increased in subjects with anxiety to diminish its symptoms. We have selectively bred two sublines from Sprague-Dawley rats that differs on its yawning frequency. The high-yawning (HY) rats have a mean of 20 yawns/h, whereas the low-yawning (LY) rats have only 2 yawns/hour. LY male rats had high anxiety-like behavior in standardized tests and high preference for alcohol intake. The aim of this study was to assess circadian disruption of sleep-wake cycle after chronic alcohol consumption.

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