One of the reasons we do not act out our vivid dream is that, our brain inhibits motor neurons, and you cannot move.
People are most likely to remember the last dream they’ve had in their sleep cycle. But it’s possible to remember a vivid dream long after it’s occurred if it seemed very intense.
Vivid dreams can be positive or negative, realistic or fantasy. Scientists know that most heavy dreaming occurs during Rapid Eye Movement (REM) sleep. REM sleep normally cycles every 90 minutes during a night of sleep and may last 20 to 25 minutes.
Nerve pathways in the brain that prevent muscles from moving are active during normal REM or dreaming sleep, resulting in temporary paralysis of your body. In REM sleep behavior disorder, these pathways no longer work and you may physically act out your dreams.
To know more about REM sleep behavior here
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