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.
2011
1981
1979
1964
2016
2008
2020
2012
2022
2018
2025
1931
2013
2023
1941
1975
2010