IELTS Listening Part 4: A Lecture on Sleep and Memory

Part Four. You will hear a lecture about sleep and memory.

You have some time to look at questions thirty-one to forty.

Now listen carefully and answer questions thirty-one to forty.

Good morning. Today, I want to challenge a habit many of you share: the all-nighter.

Yes, I can see some guilty faces already!

We tend to think of sleep as wasted time, a pause in our productivity.

In fact, it's one of the busiest periods for the brain.

During deep sleep, a region called the hippocampus replays what we learned that day.

Those memories are then gradually moved to the cortex for long-term storage.

Think of it as moving files from a cluttered desktop into a well-organised archive.

The evidence is striking.

In one study, students who missed a night's sleep were around forty percent worse at forming new memories!

In other words, cramming all night can undermine the very learning you're trying to do.

Later in the night, during dreaming or REM sleep, something rather different happens.

The brain links new information with old, which seems to boost creativity.

Legend has it that Mendeleev saw the periodic table in a dream, though historians are sceptical!

So, what does this mean in practice?

First, review difficult material shortly before you go to bed.

Second, a short nap of around twenty minutes can sharpen your focus.

And above all, protect seven to nine hours a night, especially before exams.

Next week, we'll look at what happens to memory as we get older.

Until then, get some sleep. Thank you!

That is the end of Part Four.