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Hi everybody.
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So today we're going to be going over question number six in chapter five called variations in consciousness.
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And essentially this question is kind of testing our knowledge of sleep, specifically rem sleep.
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So rem stands for the rapid eye movement stage of sleep.
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And essentially, this is our deepest form of sleep where a lot of memory consolidation happens and a lot of our dreaming.
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So me personally, i like to kind of understand the underlying concept that a question is testing rather than just the details so that i can take all of that conceptual knowledge and apply it to other questions that are testing the same topic but not necessarily the same detail.
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So essentially, i want to understand sleep and sleep stages.
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So a clever acronym that i came across to memorize my sleep stages is called bats drink blood and i've written it out over here.
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So all of the capitalized letters in the acronym actually correspond to something whereas all the lowercase letters are kind of there to make the acronym simple to understand.
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So i'll take you through the acronym and kind of explain each letter's significance.
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So the first letter is b.
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So b stands for beta waves and beta waves are the characteristic brain waves that we can record and that we see when we are completely awake in doing everyday activities, problem solving, and things like that.
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So beta waves characterize when we are completely awake.
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The next letter in our acronym is a.
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And a stands for alpha waves.
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Alpha waves are apparent when we are falling asleep, we're feeling sleepy, our eyes are closed, but we're not asleep yet.
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So these first two letters actually don't correspond to a stage of sleep, and they correspond to brain waves that we see before we fall asleep.
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So the way the acronym progresses is from completely awake to completely asleep.
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So if we look at the next letter, the next letter corresponds to t, which represents theta waves.
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So theta waves are brain waves that are apparent in our first stage of sleep.
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And this first sleep stage is referred to as n -rem -1.
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So n -rem -1 stands for the non -rapid eye movement stage 1.
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So we're not in rem sleep yet, but we're sleeping, and it's specifically our first stage of sleep.
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So if we take a look at our next letter, our next letter is s...