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.
1987
1999
2015
2024
1992
1988
2022
2023
2000
2012
1968
1983
2018
2025
2020
1995
1948
2011