BIOLOGICAL BASES OF BEHAVIOR
BIOLOGY OF CONSCIOUSNESS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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9
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6
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Detailed explanation-1: -Sleep occurs in five stages: wake, N1, N2, N3, and REM. Stages N1 to N3 are considered non-rapid eye movement (NREM) sleep, with each stage a progressively deeper sleep.
Detailed explanation-2: -On average, a single sleep cycle lasts about 90–120 minutes. So assuming you get eight hours of sleep, you could experience anywhere from four to five sleep cycles in a given night.
Detailed explanation-3: -Ideally, you need four to six cycles of sleep every 24 hours to feel fresh and rested. Each cycle contains four individual stages: three that form non-rapid eye movement (NREM) sleep and one rapid eye movement (REM) sleep.
Detailed explanation-4: -There are traditionally 4 stages of sleep: awake, light, deep, and REM sleep. Each one plays an essential role in maintaining your mental and physical health. As you’re reading about sleep, you may also see the terms “NREM” or “NREM Stages 1-4.” These are simply other terms for the phases of sleep.
Detailed explanation-5: -Sleep cycles usually repeat every 90 to 110 minutes. Each cycle is made up of a sequence of different sleep phases. There are two main types of sleep: REM sleep.