Keywords: Frontiers in Neuroscience, Â Focused Review, Â Commentary, Â Grand Challenge, Â Theme, Â Sleep, Â Dreams, Â Insomnia, Â Nightmares, Â Memories, Â Genetics, Â Medication, Â REM, Â Coma, Â Sleep and Waking, Â OSA, Â Sleep Deprivation, Â Lucid Dreaming