Sleep and daily rhythm patterns linked to mood swings and impulsive behavior: A systematic review

Twenty-three peer-reviewed studies were reviewed to explore associations between sleep disturbances and mood instability or impulsivity.

• A positive association may exist between disturbances in circadian rest-activity patterns and delayed sleep timing with mood instability and impulsivity.
• Significant variability was observed in how actigraphic variables and metrics of mood instability and impulsivity were selected and reported across studies.
• Evidence linking sleep duration, sleep efficiency, or sleep quality to mood instability and impulsivity was inconsistent.
• Future research is needed to examine the directionality of these associations over time.

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