Sleep

What is the asymmetrical sleep​?

Which animals are able to fall into ​the asymmetrical sleep​?

Are there any advantages of asymmetrical sleep?

​Are people able to fall into the asymmetrical sleep?

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​hemispheres

unihemispherically

groggy​

​somewhat

Words​

What is the asymmetrical sleep​?

Which animals are able to fall into ​the asymmetrical sleep​?

Are there any advantages of asymmetrical sleep?

​Are people able to fall into the asymmetrical sleep?

Questions

​Can you be awake and asleep at the same time?

Masako Tamaki: Can you be awake and asleep at the same time? | TED Talk

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Those ducks spend more time in unihemispheric sleep, with their outward-facing eyes open and their corresponding brain hemispheres more active.

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But during asymmetrical sleep, one brain hemisphere can be in deep sleep while the other is in lighter sleep. And in an extreme version called “unihemispheric sleep,” one hemisphere may appear completely awake while the other is in deep sleep.

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​Have you ever woken up groggy after your first night in a new place?​

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Part of your brain might’ve spent the night only somewhat asleep.

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​Use of English

Multiple Choice

(informal) delay making a decision on sth until the following day so as to have more time to consider it

• nod off

• sleep on it

• lie in

Multiple Choice

get enough sleep to keep you healthy and good looking

• lethargy

• be a dream come true

• get/have a beauty sleep

Multiple Choice

one half of the Earth/brain

• hemisphere

• snore

• lethargy

• pattern

Multiple Choice

unable to think or act quickly because you have just woken up, are sick, etc

• prone

• groggy

• designated

Multiple Choice

slightly

• nowhere

• somewhat

• ubiquitous

Poll

How long do you usually sleep?

• less than 4 hours

• 4-6 hours

• 6-8 hours

• more than 8 hours

Poll

Have you ever suffered from any sleeping disorders? (insomnia, sleep paralysis)

• Yes, from insomnia

• Yes, from sleep paralysis

• Yes, from both

• No.

Poll

How often do you see dreams?

• Quite often (5-6 times per week)

• Often(3-4 times per week)

• Never

• Every night

Masako Tamaki: Can you be awake and asleep at the same time? | TED Talk

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​Why do we dream?