It turns out that sleep  is also crucial for your brain, with a fifth of your body's  circulatory blood being channeled to it as you drift off.
Нойр нь тархинд ч гэсэн чухал. Нойрсож эхлэхэд цусны эргэлтын 1/5 нь тархи руу дамжуулагддаг.