Alarm Clock on Bed
Researchers at the University of Maryland School of Medicine note, “Elementary school-age children who get less than nine hours of sleep per night have significant differences in certain brain regions responsible for memory, intelligence, and well-being compared to those who get the recommended nine to 12 hours of sleep per night.” There were over 8,300 children who participated in their study. The researchers used MRIs, medical records, and surveys over a two-year period. They were particularly concerned to see that children who slept, on average, less than nine hours a night not only had less gray matter than their peers who slept nine or more hours but that the volume of gray matter remained low at the two years mark. Essentially, gray matter should increase during the elementary years until it peaks around 13 years of age.
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