00:00
to non-rapid eye movement sleep
00:03
is responsible for making fact-based
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memories
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permanent sleep before learning
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refreshes our ability to initially make
00:11
new memories for example studies that
00:15
compare people who remain awake
00:17
throughout the day
00:18
versus those who get to take a nap show
00:20
that
00:21
those who remain awake become
00:23
progressively worse at learning
00:25
even when their ability to concentrate
00:27
remains stable
00:29
in contrast people who get to take a nap
00:32
during the day
00:33
do markedly better at learning and
00:35
actually improve in their capacity to
00:37
memorize facts
00:38
the difference between the two groups at
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six pm is not small
00:42
a 20 learning advantage goes to those
00:45
who sleep
00:47
the second benefit of sleep for memory
00:49
comes
00:50
after learning basically it's like
00:53
clicking the save button on newly
00:55
created
00:56
files when we spend time in non-rapid
00:59
eye movement sleep
01:00
it helps cement newly learned chunks of
01:02
information
01:03
and it prevents them from fading away
01:07
there's a memory retention benefit of
01:09
between 20 and 40 percent
01:11
for those that sleep compared to those
01:13
that remain
01:14
awake for the same amount of time