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Show Lost of Sleep Impairs Memory. Insufficient sleep causes Impairment of memory, according to recent researches re-searches on the subject of sleep by Professors Engelen, Frerichs and Wey-gandt Wey-gandt of Berlin, Germany. The memory becomes unreliable even if the shortage short-age of sleep has occurred for only a short time. Eight hours Is the average needed for sleep, but brain workers sometimes require more. A reduced period of slumber may be partly made up for by Increased Intensity, a short period of deep, undisturbed sleep having hav-ing the same effect as a longer and lighter one. The investigators also conclude that brain workers need a month of rest every year and that even longer vacations vaca-tions do not cause a lessening of acquired ac-quired abilities but rather an Intensification Intensifi-cation of them. |