Disorders of dreaming
- J. Allan Hobson
‘Disorders of dreaming’ looks at the way in which the brain systems mediating dreaming can become exaggerated or distorted, with unwelcome consequences. Nightmares and night terrors are explained: night terrors are pure emotional experiences that occur on awakening from sleep and are typically associated with non-rapid eye movement (NREM) sleep. Nightmares are more likely to occur in REM sleep and, however unpleasant, are normal events suggesting that the maintenance of these emotional systems of the brain, which ensure our survival, may be one of the functions of brain activation in sleep. Sleep walking, sleep talking, tooth grinding, post-traumatic dreams, and REM sleep behaviour disorder are also discussed.