A new study from the Uni­ver­si­ty of Copen­hagen shows that the stress hor­mone nor­ep­i­neph­rine caus­es us to wake up many times dur­ing the night, and this is part of a full night’s sleep.

Most peo­ple believe that a good night’s sleep should be unin­ter­rupt­ed. How­ev­er, our body seems to think oth­er­wise. While nor­ep­i­neph­rine tech­ni­cal­ly caus­es the brain to wake up over a hun­dred times each night, we don’t think of it as wak­ing up. Neu­ro­log­i­cal­ly, a per­son actu­al­ly wakes up over a hun­dred times in a sin­gle night, and brain wave activ­i­ty indi­cates that we are awake. But it’s so short that it’s impos­si­ble to notice.

Even though the researchers stud­ied mice, their find­ings can in all like­li­hood be trans­ferred to humans because they focused on basic bio­log­i­cal mech­a­nisms, that is, mech­a­nisms that are com­mon to all mam­mals.

The new dis­cov­ery is an impor­tant piece of the puz­zle to under­stand what hap­pens in the brain when we sleep. The stress trans­mit­ter nor­ep­i­neph­rine affects sleep waves, which have proven to be impor­tant for mem­o­ry: they lit­er­al­ly reboot the brain. This is the basis of that part of sleep that helps peo­ple feel rest­ed in the morn­ing, and allows you to improve mem­o­ry and remem­ber what we learned the day before.

От Yraa

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