The importance of sleep is self-evident, and a study published in the journal Science shows that sleep can help "brainwash" to remove toxins from the brain.
According to Wired magazine, a study conducted by Laura Lewis, a professor of biomedical engineering at Boston University, found that when a person falls asleep into a deep sleep phase during non-rapid eye movements, brain neurons stop discharging, so they don't need So much oxygen, and this means less blood flows to the brain, when cerebrospinal fluids flow in and fill the space left by the blood.
根据《连线（Wired）》杂志报导，由波士顿大学生物医学工程教授Laura Lewis主持的研究发现，当人睡着进入非快速动眼期的深度睡眠阶段，脑神经元会停止放电，因此不需要那么多的氧气，而这意味更少的血液流向大脑，此时脑脊髓液（cerebrospinal fluid）会涌入，填补血液留下的空间。
In fact, a study in 2013 showed that in rodents sleeping, in vivo toxins such as beta-amyloid may be eliminated, and this toxin may cause Alzheimer's disease. To understand how these toxins were cleared, Lewis's research team recruited subjects to fall asleep in a magnetic resonance imaging (MRI) machine, observing the blood oxygen levels in the brain and the amount of cerebrospinal fluid flowing into and out of the brain.
According to Maiken Nedergaard, a neuroscientist at the University of Rochester and a brain researcher in 2013, Lewis's research shows that sleep is more than just relaxation. It also has a unique function. When people are awake, brain neurons It will not be closed at the same time. Therefore, the degree of blood loss in the brain is not sufficient to circulate a large amount of cerebrospinal fluid in the brain and to remove all accumulated metabolic by-products such as β-amyloid protein.
In addition to marking the initial body's ability to clear toxins from the brain during sleep, this study may open new avenues for the treatment and prevention of neurodegenerative diseases such as Alzheimer's.