Evolution has equipped us better night’s sleep – Gazeta Wyborcza

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Thanks to the evolution of people may sleep less than other primates (eg. chimpanzee See photo) (123RF)

                  
                  
                  

                  
             

             
         
     
   
   
   
 
 
 
 

People sleep less, but better than our distant relatives from the animal kingdom. The study 21 species of primates indicate that less need for sleep arises from the fact that it is more efficient.

 
 
 
 
 
 
 
 
 
 
 
 
 
                          
 

                 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 

         

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As a result of research conducted at Duke University researchers compiled a database of sleep patterns composed of many mammals, including 21 species of primates. It turned out that, compared to people using them extremely short. Average per day sleep takes us about seven hours. And the decisive record holders in this field are macaques Oriental and mikruski myszate who sleep even 14-17 hours a day.

This happens because our dream is more efficient - compared with other primates spend more time in deep stages of sleep, which takes us about 25 percent. the entire sleep, while in some primates barely 5 percent. - People in this respect special. Unprecedented in other primates performance allows us to sleep less - said Dr. David Samson, who spent almost 2 thousand. hours on observations of orangutans stages of sleep.

Scientists believe that the shorter man's dream is not merely the result of twenty-four hour access to artificial lighting. Separate research conducted on hunter-gatherer communities in Tanzania, Namibia and Bolivia have shown that their members spend less time napping than people in developed countries who every day use multiple light emitting gadgets. - If artificial lighting combined with contemporary lifestyle had so much impact on shortening of sleep, it would be seen that the difference in the communities not using the benefits of technology and have no access to electricity - says Samson. Studies that conducted with professor. Charlie Nunn, suggest that shortening sleep in exchange for improving its quality was long before the invention of electricity.

Scientists attribute the process of changing the way of life of our ancestors who turned their beds in the branches of trees on the ground lair. - When our ancestors already dead on the ground, they began to sleep in large groups gathered around a fire to warm and protect themselves from predators. It is this change in habits meant that they had to sleep as most intensely in the shortest possible time - says Samson.

Reducing the time needed to sleep by the scientist had positive effects. Was left more time to learn new skills and strengthening social ties, which contributed to the further development of our ancestors, and ultimately led to the emergence of Homo sapiens.

Source : Duke University

         

         

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