MSGID: 1:317/3 6272019c   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
    Acute sleep loss may alter the way we see others    
      
     Date:   
         May 3, 2022   
     Source:   
         Uppsala University   
     Summary:   
         A new study shows that young adults when sleep-deprived evaluate   
         angry faces as less trustworthy and healthy-looking. Furthermore,   
         neutral and fearful faces appear less attractive following sleep   
         loss.   
      
      
      
   FULL STORY   
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   A new study from Uppsala University shows that young adults   
   when sleep-deprived evaluate angry faces as less trustworthy and   
   healthy-looking. Furthermore, neutral and fearful faces appear less   
   attractive following sleep loss. The findings are published in the   
   scientific journal Nature and Science of Sleep.   
      
      
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   Using eye-tracking, a sensor technology that can detect what a person is   
   looking at in real time, researchers from Uppsala University in Sweden   
   performed an experiment on 45 young men and women to examine how acute   
   sleep loss affects the way humans explore and evaluate happy, fearful,   
   angry and neutral faces. The participants spent one night with no sleep   
   at all and one night with an eight-hour sleep opportunity. Their eye   
   movements were measured in the mornings following both nights.   
      
   "When sleep-deprived, our research subjects spent less time fixating   
   on faces.   
      
   Since facial expressions are crucial to understanding the emotional state   
   of others, spending less time fixating on faces after acute sleep loss   
   may increase the risk that you interpret the emotional state of others   
   inaccurately or too late," says Lieve van Egmond, first author and PhD   
   student in the Department of Surgical Sciences at Uppsala University.   
      
   "The finding that sleep-deprived subjects in our experiment rated angry   
   faces as less trustworthy and healthy-looking and neutral and fearful   
   faces as less attractive indicates that sleep loss is associated with   
   more negative social impressions of others. This could result in less   
   motivation to interact socially," says senior author Christian Benedict,   
   Associate Professor of Neuroscience.   
      
   "Our participants were young adults. Thus, we do not know whether our   
   results are generalisable to other age groups. Moreover, we do not know   
   if similar results would be seen among those suffering from chronic   
   sleep loss," says Lieve van Egmond.   
      
      
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   Story Source: Materials provided by Uppsala_University. Note: Content   
   may be edited for style and length.   
      
      
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   Journal Reference:   
      1. Lieve T van Egmond, Elisa MS Meth, Shervin Bukhari, Joachim   
      Engstro"m,   
         Maria Ilemosoglou, Jasmin Annica Keller, Shiyang Zhou, Helgi B   
         Schio"th, Christian Benedict. How Sleep-Deprived People See and   
         Evaluate Others' Faces: An Experimental Study. Nature and Science   
         of Sleep, 2022; Volume 14: 867 DOI: 10.2147/NSS.S360433   
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   Link to news story:   
   https://www.sciencedaily.com/releases/2022/05/220503102900.htm   
      
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