00:01
what is rapid eye movement
00:03
sleep as you come out of deep sleep
00:06
your brain and body actually quickly
00:08
move back into stage two sleep
00:11
then your heart rate will rise your
00:13
breathing becomes rapid and shallow
00:15
and your eyes will start darting around
00:17
from side to side
00:19
so these are the rapid eye movements or
00:23
rems after which this sleep stage
00:26
is named so rapid eye movement or rem
00:30
sleep during this time
00:33
you experience catatonia or temporary
00:36
paralysis
00:36
of the muscles accepting the eyes and
00:39
the muscles that control breathing
00:42
basically your brain stem blocks any
00:44
bodily movements to stop you acting out
00:46
your dreams
00:48
if you're woken up now you'll probably
00:49
describe a really vivid dream
00:52
under normal circumstances you don't
00:54
enter rem sleep until you've been asleep
00:56
for around 90 minutes
00:58
as the night goes on though rem stages
01:01
get longer
01:02
especially in the second half of the
01:04
night so while the first rem
01:07
stage may only last a few minutes later
01:10
stages can last for around an hour
01:13
in total rem stages of sleep make up
01:16
around
01:17
25 of sleep cycles
01:20
and nightly sleep in adults