Getting Through the Stages of Sleep Some substances can disrupt your sleep cycles. For example, caffeine ingested too close to bed can not only make it more difficult to get to sleep but also can have a negative effect on your deep sleep in the first half of the night. ...
The stages of sleep were first described in 1937 by Alfred Lee Loomis, an American also known for significant work in developing the radar. Loomis and his coworkers used EEG recordings to classify 5 different levels of sleep that they referred to using the letters A to E. When Dement and ...
Your longest and most memorable lucid dreams usually occur in the fourth and fifth sleep cycles of the night - after about six hours of sleep - during the REM sleep stages. Critically, during these later sleep cycles, periods of REM sleep become longer. The graph shows REM sleep occurring a...
The first two stages of sleep are of a relatively light quality, called transitional periods. During stage I, you relax your muscles, breathe deeply and slowly, slowly roll your eyes, and frequently move your limbs for 5-10 minutes. You might experience hypnagogic phenomena where you jerk as...
Your brain cycles through the sleep cycle 4 to 6 times each night. Each cycle is comprised of the four sleep stages: non-REM 1, non-REM 2, non-REM 3, and finally, REM. (1) Out of all sleep stages, we spend most of our time (45 percent) in non-REM 2. (1) ...
you may feel groggy and disoriented for several minutes. Stage 4 Stage 4 sleep is the second stage of deep sleep. In this stage the brain is making the slow delta waves almost exclusively. In this stage it is also very difficult to wake someone up. Both stages of deep sleep ...
(5). C (1). 根据后句when you fall asleep, you go through the four stages of the sleep cycle.当你睡着时,你会经历四个阶段的睡眠周期,可知前句讲的是睡眠工作, 因此B项"你曾经想知道睡眠到底如何工作的吗?"符合句意,故选B. (2). 根据后句you won't wake up easily. The slow eye movements...
matter of choice. Some have problems getting to sleep, others with staying asleep until the morning. Despite popular belief that sleep is one long event, research shows that, in an average night, there are five stages of sleep and four cycles, during which the sequence of stages is repeated...
As you sleep, your brain cycles through four stages of sleep. The first three are considerednon-rapid eye movement (NREM) sleep, also known as quiet sleep. The fourth israpid eye movement (REM) sleep, also known as active sleep.
The stages of sleep take on___. A.an irregular aspect.B.a regular aspectC.a punctual aspectD.a similar aspect 相关知识点: 试题来源: 解析 B [参考译文]睡眠的几个阶段呈现出……[试题分析]此题为理解题。[详细解答]文章的第二句告诉我们睡眠的不同阶段是周期性发生的,故睡眠的各阶段呈现规则的一...