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.
1951
2008
1977
1914
1934
2007
2017
1966
2021
2016
2020
—
2019
2023
2022
2010
1946
