Here's what's happening: Remember earlier how we talked
about different sleep cycles?
Not exact matches
I was talking
about how even though you have twins, they might have very
different sleep cycles.
Thanks to modern advances in brain imaging and the ability to monitor brain activity, researchers now understand more
about the
sleep - wake
cycle, the
different stages of
sleep, and the
different states of consciousness.
Such «polysomnography» studies show how people
cycle through
different sleep stages over the course of
about 100 minutes.