Lucid dreaming is an altered state of consciousness in which a person is aware that he is dreaming, and can control its content to some extent. This is a kind of borderline state between REM sleep and wakefulness.
1977
1985
1983
2017
2008
2014
2021
2006
2020
2015
2005
2018
2019
1991
2011
2000
2023