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Lack of sleep means that faces are perceived differently
Published 6 May 2022 at 17.03
DOMESTIC. A new study from researchers at Uppsala University shows that young adults who suffer from sleep deprivation perceive other people's facial expressions differently. Lack of focus can explain the phenomenon.

- When they suffered from lack of sleep, our subjects spent less time focusing on faces. Since facial expressions are crucial for understanding the emotional state of others, this can lead to reading others' moods incorrectly or too late, says Lieve van Egmond, first author of the study and doctoral student at the Department of Surgical Sciences at Uppsala University.

Those who did not sleep properly perceived, among other things, angry faces as less credible and healthy. Neutral facial expressions were perceived by the same group as less attractive.

- It indicates that lack of sleep is associated with more negative social impressions of others. This could lead to less desire to socialize with others, says Christian Benedict, associate professor of neuroscience and the study's senior author.

The results are published in the scientific journal Nature and Science of Sleep.