Is it lack of sleep that makes us irritable, or is it anger that keeps us from sleeping?

Are you irritable and irritable these days? It must be that you are moving away from good sleep. We’ve all had the experience that if we didn’t sleep well the day before, it would have a direct impact on the mood the next day.

Sleep is considered an important part of emotional function, however, in addition to anxiety (such as irritability) and depression, little is known about how sleep forms more specific emotional responses. Anger itself, however, can wake people up and disrupt sleep.

To study the causal relationship between sleep and anger, researchers at the University of Pittsburgh School of Medicine and Iowa State University in the United States tested the effects of lack of sleep on anger mood and explored the mechanisms by which it is regulated.

Is it lack of sleep that makes us irritable, or is it anger that keeps us from sleeping?

The study included an analysis of diaries and experimental results. In the diary study, the researchers tracked 202 college students for a month’s sleep and analyzed their daily diaries, which recorded sleep, daily stress (stress) sources, and anger. Preliminary results showed that sleep-deprived people showed more anger over a few days than usual.

In addition, the team added 147 community residents to the experiment. Participants were randomly divided into two groups, one to maintain a normal sleep schedule and the other to be forced to sleep at home for only five hours over two nights. During this time, the researchers assessed the level of anger of participants exposed to irritating noise.

实验发现,睡眠良好的参与者可以适应噪音,并且在两天后报告的愤怒程度也较低。 In contrast, sleep-deprived people showed higher and stronger feelings of anger at disgusting noises. This suggests that lack of sleep can disrupt emotional resilience to poor environments. Subjective drowsiness was the main cause in experiments on the effects of sleep restriction on anger.

In another related experiment, participants reported feelings of anger after losing an online competitive game and got similar results.

“This result is important because they provide compelling causal evidence that sleep restriction increases anger and frustration over time,” said Zlatan Krizan, a psychology professor at Iowa State University and lead author of the study. In addition, studies of daily diaries have shown that this effect also applies to everyday life, with young people more likely to get angry in the afternoon on days when they sleep less. “

The authors note that the findings underscore the importance of focusing on specific emotional responses (such as anger) and individuals’ ability to regulate in the event of sleep disruption.